Dolphins call out the specific names of loved ones when they become separated, a study finds．Other than humans, they are the only animals known to do this, according to the study．The big difference with dolphins is that these communications consist of whistles（鸣叫）, not words．
Earlier research found that dolphins have a “signature whistle” that would be somewhat like human shouting, “Hey everybody! I’m an adult healthy male named George, and I mean you no harm．”
The new finding is that dolphins also say the names of certain other dolphins．“Animals produced copies of the same sound when they were separated from a close partner．This supports our belief that dolphins copy another animal’s signature whistle when they want to reunite with that animal,” Stephanie King, who led the study, says．
King and her colleagues collected acoustic（声音的）data from wild dolphins around Sarasota Bay, Florida, from 1984 to 2009．The researchers also studied four adult male dolphins housed at the Seas Aquarium, also in Florida．
Those males are adults that keepers named Calvin, Khyber, Malabar and Ranier, all of whom, as well as all of the wild ones, developed their own signature whistles that served as names in communication with other dolphins．
“A dolphin uses its signature whistle to broadcast its identity and announce its presence．The signature whistles allow animals to identify one another over long distances and allow animals to recognize one another and to join up with each other,” King explains．“Dolphin whistles can be heard up to 20km away, depending on water depth and whistle frequency（频率）．”
The researchers said dolphins copy the signature whistles of loved ones, such as a mother, when the two are separated．These “names” are always used in positive situations, and are only directed toward loved ones．
While researchers are often unwilling to apply the word language to non-human communications, dolphins clearly have a very complex communication system．The underlined word “housed” in Paragraph 4 probably means “_________”．
| A．raised | B．saved | C．discovered | D．hunted |
Which of the following plays a part in whether dolphin whistles can be heard over a distance?
| A．The dolphin’s identity． |
| B．The water temperature |
| C．The whistle frequency． |
| D．The dolphin’s age． |
When do dolphins copy the signature whistles of loved ones?
| A．When there is a fight． |
| B．When their keeper comes． |
| C．When they are apart． |
| D．When they are hungry． |
Where is the passage probably taken from?
| A．A magazine about scientific advances． |
| B．A website about various animals． |
| C．A report on animal acoustics． |
| D．An essay about the relationship between humans and animals． |
My 18-month-old son, Adam, called from the front door．“Look, Mama! Doggie!” I dropped what I was doing and stuck my head out the door．Brandy, our next-door neighbor’s 11-year-old dog, was over again．“Go away!” I shouted．
Brandy’s owner had died about a month earlier．The woman’s family had emptied the house and stuck a “For Sale” sign in the front yard, but the family had left old Brandy behind．For weeks, she’d been wandering around the neighborhood．
It wasn’t that I disliked dogs or anything like that．I just didn’t think about them very much．I never had a dog growing up and had never thought to get one．
Brandy went away and I stayed outside with Adam．Then the phone rang．I went inside to take the call．When I came back, Adam was gone．I searched the yard, front and back, then the basketball court and public pool．No trace of him．I was so nervous that I ran home and called the police, then my husband．
Police searched the neighborhood．Suddenly I heard another sound: a dog barking．“It’s coming from the woods,” one of my neighbors said．We followed the barking to a wooded cliff（悬崖）．There we found my son, and he was just inches away from the edges of the cliff, fast asleep．Brandy was beside him, leaning（倚靠）against him to keep him away from the edge．When I picked Adam up, Brandy sank down on her side, breathing quickly．She must have been holding Adam there for hours!
I thanked the police and brought Adam and Brandy back to our house．She hesitated a moment on our doorstep, no doubt remembering the time I’d driven her away．
“Come on, girl,” I said．“This is your home now．” Brandy stepped in, and once she saw she was really welcome, she relaxed and lay down on the floor just inside the door．She’d done a great thing, and I wondered if she knew it ．She’d certainly touched me in a way that no animal ever had．What a pity a dog like Brandy had been left behind!What is the correct order for the events in the story about Brandy?
a．She was left behind by her owner’s family．
b．She stepped into the woman’s house．
c．She appeared at the woman’s front door．
d．She stayed beside the woman’s son for hours．
| A．d, a, b, c | B．a, c, b, d |
| C．c, d, b, a | D．a, c, d, b |
What did the woman do when she first saw Brandy?
| A．She gave her some food． |
| B．She drove her away． |
| C．She took her home． |
| D．She said thank you to her． |
Why did the woman call the police?
| A．Her son was lost |
| B．Brandy was gone． |
| C．Brandy appeared in her yard． |
| D．She got a scary call． |
How were they able to know that the woman’s son was near the cliff?
| A．By searching the neighborhood． |
| B．By hearing a dog barking． |
| C．By following a dog’s footsteps． |
| D．By hearing her son’s crying． |
Do dogs understand us?
Be careful what you say around your dog. It might understand more than you think.
A border collie named Rico recognizes the names of about 200 objects, say researchers in Germany. The dog also appears to be able to learn new words as easily as a 3-year-old child. Its word-learning skills are as good as those of a parrot or chimpanzee(黑猩猩).
In one experiment, the researchers took all 200 items that Rico is supposed to know and divided them into 20 groups of 10 objects. Then the owner told the dog to go and fetch one of the items and bring it back. In four tests, Rico got 37 out of 40 commands right. As the dog couldn't see anyone to get clues, the scientists believe Rico must understand the meanings of certain words.
In another experiment, the scientists took one toy that Rico had never seen before and put it in a room with seven toys whose names the dog already knew. The owner then told Rico to fetch the object, using a word the dog had never heard before.
The correct object was chosen in seven out of l0 tests, suggesting that the dog had worked out the answer by process of elimination(排除法). A month later, Rico remembered half of the new names, which is even more impressive.
Rico is thought to be smarter than the average dog. For one thing, Rico is a border collie, a breed (品种)known for its mental abilities. In addition, the 9-year-old dog has been trained to fetch toys by their names since the age of nine months.
It's hard to know if all dogs understand at least some of the words we say. Even if they do, they can't talk back. Still, it wouldn't hurt to sweet-talk your dog every now and then. You might just get a big, wet kiss in return!From paragraph 2 we know that _______ .
| A．animals are as clever as human beings |
| B．dogs are smarter than parrots and chimpanzees |
| C．chimpanzees have very good word-learning skills |
| D．dogs have similar learning abilities as 3-year-old children |
Both experiments show that_______ .
| A．Rico is smart enough to get all commands right |
| B．Rico can recognize different things including toys |
| C．Rico has developed the ability of learning mathematics |
| D．Rico won't forget the names of objects once recognizing them |
Which of the following statements is true?
| A．The purpose of the experiments is to show the border collie's mental abilities. |
| B．Rico has a better memory partly because of its proper early training. |
| C．The border collie is world-famous for recognizing objects. |
| D．Rico is born to understand its owner's commands. |
What does the writer want to tell us?
| A．To train your dog. |
| B．To talk to your dog. |
| C．To be friendly to your dog. |
| D．To be careful with your dog. |
An old friend from California called from the airport to tell me that he had arrived. I was not able to leave the office, but I had made plans for his arrival. After explaining where my new house was, I told him that I had left the key under the doormat (门垫). Since I knew it would be pretty late before I could get home, I suggested that he make himself at home and help himself to anything that was in the refrigerator.
Two hours later my friend phoned me from the house. At the moment, he said, he was listening to some of my records after having had a delicious meal. Now, he said, he was drinking a glass of orange juice. When I asked him if he had had any difficulty finding the house, he answered that the only problem was that he had not been able to find the key under the doormat, but luckily, the living room window by the apple tree had been left open and he had climbed in through the window. I listened to all this in great surprise. There is no apple tree outside my window, but there is one by the living room window of my next door neighbor's house!An old friend of mine called ______.
| A．to tell me to meet him at the airport |
| B．to tell me about his arrival |
| C．to ask me to leave the office |
| D．to ask me to make plans for his arrival |
My friend climbed into the room because ______ .
| A．there was an apple tree outside |
| B．the living room window was left open |
| C．he had difficulty opening the door |
| D．he hadn't found the key |
My friend telephoned me two hours later ______ .
| A．from my home |
| B．at the airport |
| C．in his office |
| D．from my neighbor's house |
Nothing is as precious as one's freedom. Dreams, aspirations and ideals mean nothing if one does not have the freedom to pursue them.
A lot has been done in the name of freedom. A lot has been said and written about freedom. In the past six months, the world witnessed Tunisian uprising, Egyptian revolution and Libyan civil war. Thousands of people fought for freedom; hundreds of people lost their lives (for freedom); people are craving for freedom. But, what exactly is freedom? We are fighting for it, we are ready to die for it, we are craving for it, but, can we really define it?
Albert Camus thinks freedom is a chance to be better. Abraham Lincoln calls it best hope of Earth. Epictetus says it's the right to live as we wish. For Moshe Dayan it's oxygen for soul. According to Urban Dictionary it's everything. And going by Oxford Dictionaries, it's power of self determination attributed to the will.
Everyone has different views about freedom. But somehow I am still not convinced because we can't really be fighting for a chance or hope. And the concept of everything is full of uncertainties. I don't think we are fighting for power of self-determination either. And as for the right to live as we wish, if we have the right to fight, then, how can we be denied the right to live as per our wish?
But the question still remains unanswered, what is freedom?
For me, freedom has a deeper and greater meaning. I think freedom is much more than just a right. It's a responsibility of doing what you think is good, not only for you but even for society. It is a state when one realizes their duties and starts respecting others' freedom.
Freedom is when we realize that we can do absolutely anything except force another person to follow us in our madness or our desire for life. Freedom is when we are no longer slaves to our desires, society, its expectations, luxury or slaves to a life we did not choose.
Freedom is when we have the courage to speak out what we know is true, do what we feel is right, and fight for what we think is unfair. One shouldn't really fight for freedom; rather, they should try to achieve it.How many famous people’s definitions of freedom are mentioned in the passage?
| A．4 | B．5 | C．6 | D．7 |
Paragraph 3 mainly tells us that _____________.
| A．Everyone longs for freedom |
| B．Everyone is fighting for freedom |
| C．People have different views about freedom |
| D．Famous people have a deeper understanding of freedom |
Which of the following will the author agree with?
| A．Freedom is a chance to live better. |
| B．Freedom is our best hope in the world. |
| C．Freedom is the right to live as we wish. |
| D．Freedom is a responsibility of doing what is good. |
What is the author’s purpose of writing the passage?
| A．To show different views about freedom. |
| B．To express his understanding of freedom. |
| C．To encourage us to pursue our dreams and aspirations. |
| D．To argue against some famous people’s understanding of freedom. |
After I made it to the city center, I started to feel it might be easy for a foreigner to deal with the great size of Beijing. With growing confidence, I decided to take the subway to the hotel, not realizing that the network didn’t go that far. Impressed with the cleanliness of the station, I bought a ticket and boarded the first train that came along.
After a few minutes I asked in English of course a young man seated next to me where I should get off closest to the Friendship Hotel. Wearing a smart business suit and tie, he would surely speak English, wouldn’t he? Unfortunately, he couldn’t understand me but seemed very friendly. I showed him the room card with all the information of the Friendship Hotel in Chinese characters. He looked at it, and then his eyes moved quickly to the carriage (车厢) subway map. Next, he raised three fingers of his right hand.
In Australia, raising fingers at someone is not usually nice, but this man wasn’t smiling. At the next station he showed me two fingers. Now in Australia, that’s really rude, but I got the message. When we stopped at the third station, he didn’t just point to the door, but got up, took me out of the train, and led me to the top of the stairs, and out onto the street. Then he stopped a taxi and told the driver where to take me.
All this came from a man who couldn’t speak my language, and I couldn’t speak his. I was now speechless, especially when he refused my offer of money. I felt a little embarrassed having even thought he would accept a tip.
This experience made it clear I had to learn some Chinese quickly or my adventures might start turning into bad luck.The author decided to take the subway because ________.
| A．he lived near the city center |
| B．the network covered most of the stops |
| C．he believed in his ability to deal with the trip |
| D．he had a good impression of its cleanliness |
Having been shown the room card, the young man_________.
| A．understood the author well |
| B．still remained puzzled |
| C．answered the author directly |
| D．pointed at the subway map |
Which of the following can’t be used to describe the young man?
| A．helpful | B．rude |
| C．warmhearted | D．caring |
The author’s purpose of writing this passage is mainly to ________.
| A．prove the importance of being careful |
| B．appreciate the kindness of the young man |
| C．complain some cultural misunderstanding |
| D．describe one of his adventurous experiences |
You may have noticed something different when you ate at your favorite restaurant. Or perhaps you picked up on it while looking through your social media apps (社交媒体软件) . You guessed it ---we’re becoming a foodie (吃货) culture.
For some, that means photographing every dish, but others are taking it one step further. Sophia Hampton, a senior at Staples High School in US, chooses to make her own food. She has been published in Future Chefs, a cookbook of recipes (食谱) by teens.
Hampton’s best advice for those who want to be foodies is to get in the kitchen.
“Start cooking,” she said. “There are so many resources online, like recipes and articles about food. Go to your local farmers’ market and start cooking with them.
Besides blogs and online resources, there are also hands-on cooking classes for students. The Chopping Block, a Chicago cooking school, offers many different classes for teens, including courses on chocolate and French food.
By attending cooking classes, surfing online and going to restaurants, you can find endless recipes. But sometimes becoming a real foodie means being behind a camera. As our food-loving culture becomes more popular and teen-friendly, social media apps like Facebook, have become major players in food culture.
“Getting involved in foodie culture is as easy as having a camera and a social media app,” one foodie said. “I always go to streets and farmers’ markets to take beautiful pictures of food. Wherever food prices are expensive, the photos are free.”What does Hampton advise those who want to be foodies to do?
| A．Post their recipes online. |
| B．Cook food by themselves. |
| C．Eat at their favorite restaurant. |
| D．Take photos of every dish they eat. |
Where can students find new recipes, according to the article?
① cooking classes ② online resources
③ new restaurant ④ public libraries
| A．①②③ | B．①③④ | C．②③④ | D．①②④ |
What has made foodie culture more popular, according to the article?
| A．People’s growing interest in traditional culture. |
| B．The convenience of getting different food. |
| C．The use of cameras and social media. |
| D．The drop in food prices. |
How often do you let other people like a bad driver, a rude waiter, or an angry boss, change your mood (情绪)?
Sixteen years ago I learned a lesson. I got in a taxi, and we took off for Grand Central Station. We were driving in the right lane (车道) when all of a sudden, a black car jumped out of a parking space right in front of us. My taxi driver used his brakes (车闸), the tires made a loud noise, and at the very last moment our car stopped just 3cm from the back of the other car.
I couldn’t believe it. But then I couldn’t believe what happened next. The driver of the other car, the guy who almost caused a big accident, turned his head around and he started shouting at us. I couldn’t believe it!
My taxi driver just smiled and waved at the guy. So, I said, “Why did you just do that? This guy could have killed us!” And this is when my taxi driver told me what I now call, “The Law of the Garbage Truck”. He said, “Many people are like garbage trucks. They run around full of garbage, full of anger and disappointment. As their garbage piles up, they look for a place to dump (倾倒) it. And if you let them, they’ll dump it on you.
So I started thinking how often I let Garbage Trucks run right over me and how often I take their garbage and spread it to other people.
I began to see Garbage Trucks. I see the load people are carrying. I see them coming to dump it. And like my taxi driver, I don’t take it personally. I just smile, wave, wish them well, and move on.What happened to the author on his way to Grand Central Station?
| A．He was caught in a traffic jam. |
| B．He had a fight with his taxi driver. |
| C．His taxi suddenly got a flat tire. |
| D．His taxi almost ran into another car. |
When the author saw his taxi driver smile and wave at the driver of the black car, he ______.
| A．got very angry |
| B．was deeply impressed |
| C．felt quite disappointed |
| D．praised him for his manners |
The underlined part “the load” in the last paragraph probably refers to _______.
| A．waste materials | B．poor habits |
| C．the bad mood | D．great pressure |
How did the author learn to deal with Garbage Trucks?
| A．Fight back immediately. |
| B．Call the police for help. |
| C．Smile and move on. |
| D．Dump it on someone else. |
Researchers are finding new ways to save snakebite victims.Experts discussed the latest findings during a recent conference.
Scientists in Australia have shown that a chemical called nitric oxide could increase the chances of surviving a poisonous snakebite.The scientists injected rats with a deadly amount of snake venom.Then they rubbed an ointment(软膏)containing nitric oxide on the skin around the injection site.The study found that the rats lived about one-third longer than if nitric oxide had not been used.But the treatment had to be started very quickly.
Dirk van Helden led the research.He says the nitric oxide ointment also showed promise in humans.The study appeared earlier this year in the journal Nature Medicine.Scientists say the findings could help save many lives.A recent study found that poisonous snakes cause as many as ninety-four thousand deaths worldwide each year.But Ulrich Kuch of the Biodiversity and Climate Research Center in Frankfurt,Germany,says that number appears to be low.
Mr Kuch says many deaths could be prohibited if snakebite victims are treated correctly,but they often go to traditional healers or do not seek any help at all.He said,“Sometimes it’s because there is no treatment available—no antivenom(抗蛇毒血清),which is the specific(特殊的)drug to treat snakebites—or health care staff do not know how to treat snakebites,and sometimes its because transportation to get to a health facility is not available or too expensive.
Here is no single antivenom that can be used to treat all snakebites.The antivenom must be specific to the kind of snake that bit the person.In some countries the treatment is costly,while in others there is no such treatment.What is this passage mainly about?( )
| A．Snakebite deaths around the world. |
| B．Progress in fighting snakebite deaths. |
| C．Snakebite treatment around the world. |
| D．The chances of surviving a poisonous snakebite. |
After being rubbed an ointment containing nitric oxide,the rats .
| A．suffered no pain |
| B．died immediately |
| C．lived a little longer |
| D．started feeling uncomfortable |
What does Paragraph 3 suggest?( )
| A．The number of deaths caused by snakebites is becoming lower each year. |
| B．The nitric oxide ointment has saved thousands of people’s lives. |
| C．It is very important to find an effective way to treat snakebites. |
| D．The number of deaths caused by snakebites worldwide is low. |
What does the underlined word “prohibited” in Paragraph 4 mean?( )
| A．caused. | B．considered. |
| C．examined. | D．prevented. |
What is implied in the last paragraph?( )
| A．Antivenom can be made very easily. |
| B．It’s very important to use the correct antivenom to treat snakebite victims. |
| C．Antivenom is extremely expensive all over the world. |
| D．A person bitten by a snake will survive as long as there is antivenom. |
Many animals recognize their food because they see it. So do humans. When you see an apple or a piece of chocolate you know that these are things you can eat. You can also use other senses when you choose your food. You may like it because it smells good or because it tastes good. You may dislike some types of food because they do not look, smell or taste very nice. Different animals use different senses to find and choose their food. A few animals depend on only one of their senses, while most animals use more than one sense.
Although there are many different types of food, some animals spend their lives eating only one type. The giant panda eats only one particular type of bamboo. Other animals eat only one type of food even when given the choice. A kind of white butterfly will stay on the leaves of a cabbage, even though there are plenty of other vegetables in the garden. However, most animals have a more varied diet. The bear eats fruits and fish. The fox eats small animals, birds and fruits. The diet of these animals will be different depending on the season.
Humans have a very varied diet. We often eat food because we like it and not because it is good for us. In countries such as France and Britain, people eat foods with too much sugar. This makes them overweight, which is bad for their health. Eating too much red meat and animal products, such as butter, can also be bad for the health. Choosing the right food, therefore, has become an area of study in modern life.We can infer from the text that humans and animals _________.
| A．depend on one sense in choosing food |
| B．are not satisfied with their food |
| C．choose food in similar ways |
| D．eat entirely different food |
Which of the following eats only one type of food?
| A．The white butterfly. | B．The small bird. |
| C．The bear. | D．The fox. |
Certain animals change their choice of food when ___________.
| A．the season changes |
| B．the food color changes |
| C．they move to different places |
| D．they are attracted by different smells |
We can learn from the last paragraph that __________.
| A．food is chosen for a good reason |
| B．French and British food is good |
| C．some people have few choices of food |
| D．some people care little about healthy diet |
“Sticks and stones may break my bones, but words will never hurt me.”
You probably heard those lines in grammar school, but do you really agree that harsh(严厉的) or negative words do not harm us? Words have power. Surely we all have had our feelings hurt by something someone said.
We may not say words to hurt others, but the way we interpret (解释) them and how we say them may cause great harm. Here’s an example:
An ancient king dreamed all his teeth had fallen out. He sent for a wise man to explain his dream to him: the dream means that all your relatives will die and you will be left alone! The king was very angry and threw the interpreter into prison. He then sent for another interpreter who said, “Congratulations! King! You will live many more years. In fact, you will survive all your relatives. Long Live the King!”
Both interpreters gave the same interpretation, but there was a huge difference in the way they said it.
Our speech must be understood by those who hear our words, but the way we say things and the intention behind them have as much power as the words themselves. Words can cause anger or appreciation. Which would you rather receive?
People who say harsh and negative things may not mean to harm, but have you ever known anyone who is a naysayer? They often look at the dark sides of things. They always see the glass as half empty rather than half full. How do you feel when you are around this type of person? Remember: words have power. Use them wisely.The author mentions the story of the ancient king to show that _____.
| A．one dream sometimes has different explanations |
| B．good words can bring good luck to people |
| C．people should be careful when talking to a king |
| D．different ways of saying things have different effects |
The underlined word naysayer in the last paragraph refers to a person who always _____.
| A．has a negative attitude |
| B．likes to be praised |
| C．talks big |
| D．likes to repeat what others say |
According to the text, how can people understand each other better?
| A．By sharing different life experiences |
| B．By accepting different habits. |
| C．By properly using words |
| D．By recognizing different values. |
The passage mainly talks about ______.
| A．the power of words |
| B．the cruelty of the king |
| C．how to understand others |
| D．how to build good relationships |
Twenty years ago, I drove a taxi for a living. One night I went to pick up a passenger at 2:30 AM. When I arrived to collect, I found the building was dark except for a single light in a ground floor window.
I walked to the door and knocked. “Just a minute.” answered a weak, elderly voice. After a long pause, the door opened. A small woman in her eighties stood before me. By her side was a small suitcase. I took the suitcase to the car, and then returned to help the woman. She took my arm and we walked slowly toward the car. She kept thanking me for my kindness. “It’s nothing,” I told her. “I just try to treat my passengers the way I would want my mother treated.”
“Oh, you’re such a good man,” she said. When we got into the taxi, she gave me an address, and then asked, “Could you drive through downtown?”
“It’s not the shortest way.” I answered quickly.
“Oh, I’m in no hurry.” she said. “I’m on my way to a hospice（临终医院）. I don’t have any family left. The doctor says I don’t have very long.”
I quietly reached over and shut off the meter（计价器）. For the next two hours, we drove through the city. She showed me the building where she had once worked, the neighborhood where she had lived, and the furniture shop that had once been a ballroom where she had gone dancing as a girl. Sometimes she’d ask me to slow down in front of a particular building and would sit staring into the darkness, saying nothing. At dawn, she suddenly said, “I’m tired. Let’s go now.” We drove in silence to the address she had given me.
“How much do I owe you?” she asked.
“Nothing,” I said.
“You have to make a living.” she answered. “Oh, there are other passengers,” I answered.
Almost without thinking, I bent and gave her a hug. She held onto me tightly. Our hug ended with her remark. “You gave an old woman a little moment of joy.” The old woman chose to ride through the city in order to .
| A．show she was familiar with the city |
| B．see some places for the last time |
| C．let the driver earn more money |
| D．reach the destination on time |
The taxi driver did not charge the old woman because he .
| A．wanted to do her a favor |
| B．shut off the meter by mistake |
| C．had received her payment in advance |
| D．was in a hurry to take other passengers |
What can we learn from the story?
| A．Giving is always a pleasure. |
| B．People should respect each other. |
| C．An act of kindness can bring people great joy. |
| D．People should learn to appreciate others’ concern. |
Dolphins call out the specific names of loved ones when they become separated, a study finds．Other than humans, they are the only animals known to do this, according to the study．The big difference with dolphins is that these communications consist of whistles（鸣叫）, not words．
Earlier research found that dolphins have a “signature whistle” that would be somewhat like human shouting, “Hey everybody! I’m an adult healthy male named George, and I mean you no harm．”
The new finding is that dolphins also say the names of certain other dolphins．“Animals produced copies of the same sound when they were separated from a close partner．This supports our belief that dolphins copy another animal’s signature whistle when they want to reunite with that animal,” Stephanie King, who led the study, says．
King and her colleagues collected acoustic（声音的）data from wild dolphins around Sarasota Bay, Florida, from 1984 to 2009．The researchers also studied four adult male dolphins housed at the Seas Aquarium, also in Florida．
Those males are adults that keepers named Calvin, Khyber, Malabar and Ranier, all of whom, as well as all of the wild ones, developed their own signature whistles that served as names in communication with other dolphins．
“A dolphin uses its signature whistle to broadcast its identity and announce its presence．The signature whistles allow animals to identify one another over long distances and allow animals to recognize one another and to join up with each other,” King explains．“Dolphin whistles can be heard up to 20km away, depending on water depth and whistle frequency（频率）．”
The researchers said dolphins copy the signature whistles of loved ones, such as a mother, when the two are separated．These “names” are always used in positive situations, and are only directed toward loved ones．
While researchers are often unwilling to apply the word language to non-human communications, dolphins clearly have a very complex communication system．The underlined word “housed” in Paragraph 4 probably means “_________”．
| A．raised | B．saved | C．discovered | D．hunted |
Which one plays a part in whether dolphin whistles can be heard over a distance?
| A．The dolphin’s identity． |
| B．The water temperature |
| C．The whistle frequency． |
| D．The dolphin’s age． |
When do dolphins copy the signature whistles of loved ones?
| A．When there is a fight． |
| B．When their keeper comes． |
| C．When they are apart． |
| D．When they are hungry． |
The passage probably is taken from______
| A．A magazine about scientific advances． |
| B．A website about various animals． |
| C．A report on animal acoustics． |
| D．An essay about the relationship between humans and animals． |
My 18-month-old son, Adam, called from the front door．“Look, Mama! Doggie!” I dropped what I was doing and stuck my head out the door．Brandy, our next-door neighbor’s 11-year-old dog, was over again．“Go away!” I shouted．
Brandy’s owner had died about a month earlier．The woman’s family had emptied the house and stuck a “For Sale” sign in the front yard, but the family had left old Brandy behind．For weeks, she’d been wandering around the neighborhood．
It wasn’t that I disliked dogs or anything like that．I just didn’t think about them very much．I never had a dog growing up and had never thought to get one．
Brandy went away and I stayed outside with Adam．Then the phone rang．I went inside to take the call．When I came back, Adam was gone．I searched the yard, front and back, then the basketball court and public pool．No trace of him．I was so nervous that I ran home and called the police, then my husband．
Police searched the neighborhood．Suddenly I heard another sound: a dog barking．“It’s coming from the woods,” one of my neighbors said．We followed the barking to a wooded cliff（悬崖）．There we found my son, and he was just inches away from the edges of the cliff, fast asleep．Brandy was beside him, leaning（倚靠）against him to keep him away from the edge．When I picked Adam up, Brandy sank down on her side, breathing quickly．She must have been holding Adam there for hours!
I thanked the police and brought Adam and Brandy back to our house．She hesitated a moment on our doorstep, no doubt remembering the time I’d driven her away．
“Come on, girl,” I said．“This is your home now．” Brandy stepped in, and once she saw she was really welcome, she relaxed and lay down on the floor just inside the door．She’d done a great thing, and I wondered if she knew it ．She’d certainly touched me in a way that no animal ever had．What a pity a dog like Brandy had been left behind!What is the correct order for the events in the story about Brandy?
a．She was left behind by her owner’s family．
b．She stepped into the woman’s house．
c．She appeared at the woman’s front door．
d．She stayed beside the woman’s son for hours．
| A．d, a, b, c | B．a, c, b, d |
| C．c, d, b, a | D．a, c, d, b |
What did the woman do when she first saw Brandy?
| A．She gave her some food． |
| B．She drove her away． |
| C．She took her home． |
| D．She said thank you to her． |
How were they able to be aware that the woman’s son was near the cliff?
| A．By searching the neighborhood． |
| B．By hearing a dog barking． |
| C．By following a dog’s footsteps． |
| D．By hearing her son’s crying． |
If you need glasses to read this, you are among the majority of Chinese students. That’s because most students in China are short-sighted which means they can only see things close up and distant things will be blurry. Four-fifths of high school students wear glasses and now more and more children in primary school need glasses, too.
This epidemic of poor eyesight has two very simple causes: too much time spent indoors studying and too little time spent outdoors playing. Reading and writing for hours and hours, sometimes in poorly lighted rooms, causes eyesight to weaken. But students have to do this because there is so much pressure on them to succeed in school. And because they spend so much time indoors at school and at home, they have less time to spend outdoors enjoying the sun.
The sun, as a consequence, is important in developing good eyesight. Exposure to daylight releases a chemical in the eyes that prevents, or at least delays, short-sightedness. According to a study by Ian Morgan of Australian National University, Australian children and Chinese children have the same level of eyesight before they start school, but once they enter primary school, Chinese children only spend about an hour a day outside, while Australian children spend three to four hours each day in the sunshine. The result is that while about 40 percent of Chinese primary school students need glasses, only three percent of Australian children do.
Wearing glasses may not seem like a big deal. For some, wearing glasses can even be an opportunity to make a fashion statement. But poor eyesight at a young age can have serious long term consequences. As you get older, your eyesight can worsen and lead to things like macular degeneration(黄斑变性), a condition of the eyes for which there is no cure and which can eventually lead to blindness.
With all that in mind, don’t you think it’s time to give your eyes a break? Try spending a little less time inside and go for a walk in the park, instead. It’s the healthy thing to do and your eyes will thank you for it.What does the underlined word “blurry” mean?
| A．unpopular. | B．unpleasant. |
| C．unclear. | D．unconscious. |
How should the students protect their eyesight according to the passage?
| A．They should study less and less. |
| B．They should stay longer outdoors. |
| C．They should wear sun-glasses. |
| D．They should have a longer rest in bed. |
It can be inferred from the passage that _____ is to blame for the poor eyesight of Chinese children.
| A．the ever-worsening bad weather |
| B．the ever-increasing burden of study |
| C．the ever-decreasing sunny days |
| D．the ever-decreasing period of study time |
What is the purpose of this article?
| A．To explain why Chinese students are poor-sighted. |
| B．To admire Australian children’s good eyesight. |
| C．To criticize the present education system. |
| D．To call on people to protect Chinese children’s eyesight |
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