Some scientists say that animals in the ocean are increasingly threatened by noise pollution caused by human beings. The noise that affect sea creatures comes from a number of human activities. It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.
Decibels（分贝）measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one hundred and ninety-five would have the same effect.
Some scientists have proposed setting a noise limit of one hundred and twenty decibels in oceans. They have observed that noises at that level can frighten and confuse whales.
A team of American and Canadian scientists discovered that loud noises can seriously injure some animals. The research team found that powerful underwater explosions were causing whales in the area to lose their hearing. This seriously affected the whales’ ability to exchange information and find their way. Some of the whales even died. The explosions had caused their ears to bleed and become infected.
Many researchers whose work depends on ocean sounds object to a limit of one hundred and twenty decibels. They say such a limit would mean an end to important industrial and scientific research.
Scientists do not know how much and what kinds of noises are harmful to ocean animals. However, many scientists suspect that noise is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.According to the passage, which of the following is increasingly dangerous to sea creatures?
| A．The man-made noises. |
| B．The noises made by themselves. |
| C．The sound of earthquakes. |
| D．The sound of the ice-breaking. |
As to the influence of noises on whales, which of the following statements is true?
| A．They are deaf to noises. |
| B．Noises at a certain level may hurt them. |
| C．They are easily confused by noises. |
| D．Noises will limit their ability to reproduce. |
We can know from the passage that many scientists think that the noise limit of one hundred twenty decibels would______.
| A．prevent them from doing their research work |
| B．benefit them a lot in their research work |
| C．do good to their health |
| D．increase the industrial output |
According to the passage, what will scientists most probably do in the future?
| A．They will try their best to decrease noise. |
| B．They will work hard to cut down noise pollution. |
| C．They will study the effect of different noises. |
| D．They will protect animals from harmful noises. |
Knowing the best way to study will help you to be a better student. By using your time properly, you can do your homework more quickly. Learning to study is not difficult.
The first thing to remember is that you must be willing to learn. It doesn’t mean that you must always like the subject. It does mean, however, that you must be wil1ing to do whatever is necessary to learn. Try to understand why it is important and how it will help you now and later to do and learn other things. Knowing mathematics facts will be useful in your whole life. Knowing how to spell makes any kind of writing easier. Sometimes subject that you think is going to be uninteresting will be exciting when you begin to work at it and understand it more clearly. Learning things can be fun if you are willing to work with them.
Here’s some advice for you: have a certain time each day and a quiet place with good lighting for study, so that you can concentrate on your study without interruptions(中断); have everything ready before you sit down to study, a dictionary, paper, a pen and books; be sure you understand what you should learn before you start; read carefully and pay special attention to the most important things; when memorizing, first find out the main parts and then recite the whole thing; check your homework after you finish it; never forget the importance of review and preview.The main purpose of the article is______
| A．to prove that learning is not difficult |
| B．to make the readers be interested in study |
| C．to tell the importance of self teaching |
| D．to tell the students how to study well |
We learn things because______
| A．our parents want us to learn |
| B．every student learns at school |
| C．we may use these things in the future |
| D．we like the subjects |
Which of the following is NOT the advice given in the article?
| A．To put a pen, paper and books beside you before study. |
| B．To study at any possible time and place. |
| C．To review and preview. |
| D．To pay attention to the most important things. |
Then comes July, and with it examinations, but these are soon finished and with them ends the school year. Boys and girls have nearly two months’ holiday before them as they leave school by train and car to return home to their fathers and mothers.
The summer holidays are the best part of the year for most children. The weather is usually good, so that one can spend most of one’s time playing in the garden or, if one lives in the country, out in the woods and fields. Even if one lives in a big town, one can usually go to a park to play.
The best place for a summer holiday, however, is the seaside. Some children are lucky enough to live near the sea, but for the others who do not, a week or two at one of the big seaside towns is something that they will talk about for the whole of the following year.
In England, it is not only the rich who can take their children to the seaside; if a factory worker or a bus driver, a street cleaner or a waiter wants to take his wife and children to Southend or Margate, Blackpoor or Clacton, he is usually quite able to do so.
Now, what is it that children like so much about the seaside? I think it is the sand, sea and sun more than any other things. Of course, there are lots of new things to see, nice things to eat, and exciting things to do, but it is the feeling of sand under one’s feet, of salt water on one’s skin, and of the warm sun on one’s back that make the seaside what it is.After the examination, pupils leave for home________
| A．by train only |
| B．by air |
| C．by bike |
| D．by either train or car |
July and August are the brightest months for most children, for they can_____.
| A．stay with their parents for all the vacation. |
| B．do more reading |
| C．play out-of-door |
| D．meet their old friends |
Children like the seaside so much, because they can ______.
| A．swim in the sea |
| B．play with the sand |
| C．take a sun bath |
| D．do all of the above |
Miss Gogers taught physics in a New York school. Last month she explained to one of her classes about sound, and she decided to test them to see how successful she had been in her explanation. She said to them, “Now I have a brother in Los Angeles. If I was calling him on the phone and at the same time you were 75 feet away, listening to me from across the street, which of you would hear what I said earlier, my brother or you and for what reason?”
Tom at once answered, “Your brother. Because electricity travels faster than sound waves.” “That's every good,” Miss Gogers answered; but then one of the girls raised her hand, and Miss Gogers said. “Yes, Kate.”
“I disagree,” Kate said. “Your brother would hear you earlier because when it's 11 o'clock here it's only 8 o'clock in Los Angeles.”Miss Gogers was teaching her class_________.
| A．how to telephone |
| B．about electricity |
| C．about time zone(时区) |
| D．about sound |
Miss Gogers raised this question because she wanted to know whether______.
| A．it was easy to phone to Los Angeles |
| B．her student could hear her from 75 feet away |
| C．her students had grasped her lesson |
| D．sound waves were slower than electricity |
Tom thought that electricity was _________.
| A．slower than sound waves |
| B．faster than sound waves |
| C．not so fast as sound waves |
| D．as fast as sound waves |
Kate thought Tom was wrong because _______.
| A．clocks in Los Angeles showed a different time from those in New York |
| B．electricity was slower than sound waves |
| C．Tom was not good at physics at all |
| D．Tom's answer had nothing to do with sound waves |
Whose answer do you think is correct according to the law of physics?
| A．Tom's | B．Kate's |
| C．Both A and B | D．Neither A nor B |
You don’t know what you’ve got until it’s gone. I’ve learned that through my personal experiences. A few months ago, I woke up deaf in one ear. I did not pay much attention to it at first. It felt that I had water in my ear. However, I began to hear less and less out of that ear. I even had to ask people to talk into my other ear so that I could hear them. I didn’t realize how serious it was until late in the day (为时太晚). One evening, when I was sitting on my bed doing chemistry homework, I fell off my bed. When trying to get up, I was incredibly dizzy (头晕的).
I went to see a doctor and he told me that hearing loss was common. However, hearing loss is usually bilateral, or occurs in both ears. He said that my hearing should come back within a week. After about a week the dizziness eventually went away, but the hearing loss did not. The medicine helped and I gained some of my hearing back. After many hearing tests, the doctor diagnosed (诊断) that I had permanent hearing loss in that ear.
School became harder for me because I couldn’t hear my teachers. I was very depressed. Finally, I bought a hearing aid. With the hearing aid, my hearing is almost back to normal. It makes school and group conversations easier.
My friends, teachers and even complete strangers always ask me questions about hearing loss. I answer them patiently. I never get offended because I know this is new to them. I am delighted that I can teach them something new.
What I have learned from this particular situation is that when things are desperate（绝望的；急切的）, there is always something good that can come out of it. My experiences have given me an opportunity to teach people about hearing loss and also taught me about the value of hearing.What happened to the author?
| A．He is born deaf. |
| B．He becomes deaf in a traffic accident. |
| C．He woke up deaf in one ear one day. |
| D．He becomes deaf due to taking some medicine. |
The author fell off his bed when .
| A．getting up from bed | B．doing his homework |
| C．waking up from a dream | D．wearing his clothes |
From the text we can infer that .
| A．the author’s hearing loss was cured after the treatment |
| B．the author is unwilling to talk about his hearing loss with others |
| C．the author took some medicine to treat his hearing loss |
| D．the medicine that doctors gave him didn’t work at all |
At present, the author is .
| A．desperate | B．optimistic |
| C．depressed | D．angry |
Only about 30 percent of people in the US know how to perform CPR (心肺复苏术). Recently, a 9-year-old boy showed a Georgia woman how to perform CPR on her newborn baby.
Susanna Rohm said she had experienced a parent’s worst nightmare (噩梦) — her 2-month-old son, Isiah, was not breathing. “I noticed he looked pale. I looked at his arms and his legs and they were limp (无力的),” Rohm told a local newspaper. “Then I noticed that he looked like he wasn’t alive.” In dismay, she dropped and broke her cellphone. Rohm had to run into the street, screaming for help.
“I had him in my arms and screamed over and over. Then I ran outside. I saw two boys playing across the street, and I yelled, ‘Go and ask your parents to call 911,’” Rohm said. But the two boys were able to do more than that. Nine-year-old Ethan Wilson took action, showing Rohm how to perform CPR on little Isiah while ten-year-old Rocky Hurt helped as well.
Rocky said he had learned the CPR technique from a poster in a health class at their school, Sedalia Park Elementary. “I was thinking we’d better give her a helping hand instead of getting scared,” Ethan said. “I told her to push on the baby’s chest five to ten times a minute with only two fingers, tilt back the baby’s head, plug the baby’s nose and breathe into the baby’s mouth,” Ethan said in an interview.
At last, Isiah began crying and was breathing again. He spent two nights in a local hospital. “If the little boy hadn’t shown me what to do right there, my baby would probably not be alive right now,” Rohm said.We can learn from Paragraph 1 that in the US, .
| A．CPR is considered important by most people |
| B．most children are taught how to perform CPR |
| C．many parents don’t know how to perform CPR |
| D．kids must learn how to perform CPR on babies |
What does the underlined word “dismay” in Paragraph 2 probably mean?
| A．Panic. | B．Anger. |
| C．Excitement. | D．Joy. |
What did Rohm do when she saw the two boys?
| A．She asked them to call 911 as soon as possible. |
| B．She asked them to teach her how to perform CPR. |
| C．She asked them to ask their parents for help. |
| D．She asked them to help her perform CPR on her baby. |
What Rohm said in the last paragraph shows that she was .
| A．grateful | B．regretful |
| C．surprised | D．ashamed |
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