Sleeping in on Saturday after a few 
weeks of too little shuteye may feel refreshing, but it can give a false sense of security.
New research shows long-term sleep loss cannot be cured that easily. Scientists researched the effects of short- and long-term sleep loss and found that those who suffer long-term sleep loss may function normally soon after waking up, but experience steadily slow
er reaction times as the day goes by, even if they had tried to catch up the previous night.
The research has important safety significances in an increasingly busy society, not just for shift-workers but for the roughly one in six Americans who regularly get six hours or less of sleep a night.
“We know that staying awake 24 hours without sleep will affect your performance to do all sorts of things, and this effect equals to drinking too much when driving,” said lead researcher Dr. Daniel Cohen of Boston’s Brigham and Women’s Hospital. But when those who suffer long-term sleep loss become all-nighters, “the harm is increased ten times,” Cohen said.
The National Institutes of Health says adults need seven hours to nine hours of sleep for good health. Regularly getting too little sleep increases the risk of health problems, including memory impairment and a weakened immune system. More immediately, too little sleep affects reaction times; sleepiness is to blame for car crashes and other accidents.
It has critically important complicated and unexpected results for anyone who works “crazy hours” and thinks they are performing fine with a few hours of w
eeknight sleep, said Harris, director at New York’s Montefiore Medical Center. “Don’t think you can just bank up your sleep on the weekend, because it doesn’t work that way,” he warned.The text mainly advises people ______.
| A．to sleep more time | B．to sleep in on Saturday |
| C．to sleep scientifically | D．to sleep little on weekend |
People with long-term sleep loss ______.
| A．are quicker in thinking | B．may feel refreshed soon after waking up |
| C．are surely energetic | D．can have a strong sense of security |
What can we learn from the text?
| A．Most of the Americans get six hours or less of sleep a night. |
| B．Staying up is worse for those who suffer long-term sleep loss. |
| C．Traffic accidents have little to do with sleepiness. |
| D．One in six Americans are all-nighters. |
Which of the following is the immediate effect of long-term sleep loss?
| A．Health problems | B．Immune system |
| C．Reaction times | D．Memory impairment |
The underlined phrase “bank up” in the last paragraph most probably means ____.
| A．pile up | B．pick up | C．add up | D．build up |
What are American high schools like? Well，I'm happy to tell you what I know．
When I started school here，it had already been a week since the schoo1 opened．At this school，freshmen usually go on a trip for about three days at the beginning of school. Unfortunately I missed that wonderful trip．which would have been the best time to get to know my classmates．I was really sad．I wished I’d known about it earlier.
Despite the disappointment，however，I gradually adapted to my new life and schoo1．
There is a space in the basement of the teaching building where students chat and meet each other．As we do not always have the same classrooms and classmates，the school wants us to get to know each other there．Students usually come to school early，sit in that space and have fun．Around the space，there are many lockers for students to leave their books in，so that students do not have to carry a heavy schoolbag everywhere．
It really surprises me that we have almost no textbooks．We only have textbooks for World History and Algebra and they are big and heavy，like bricks．For other classes，we only need binders(活页夹)with paper in them．Without textbooks，students learn things freely and actively．For example，my humanities teacher just teaches us what is in her mind at the time．We never know what we will learn．
Another difference between American schools and Chinese schools is that American schools care about students’ morality more than their academic studies．For example，if you do not finish your homework，you will just be asked to do it later，but if you cheat or lie，you will get a warning or even be kicked out．
I think that most students here are good at schoolwork as well，but compared to Chinese students，they can make learning a more joyful experience．I think we should take the good points from our two different kinds of education to perfect our approach to studying．
What was the writer sad for?
| A．He was late for schoo1． |
| B．He missed the trip at the beginning of schoo1． |
| C．He didn’t know anyone． |
| D．American students looked down upon him． |
Why do students go to the basement of the teaching building?
| A．To attend class． | B．To share a classroom． |
| C．To have fun． | D．To meet teachers． |
According to the passage，in American high schools，_________．
| A．you are likely to be kicked out if you cheat |
| B．you’11 be punished if you do not finish your homework |
| C．students are better at school work than Chinese students |
| D．students care much about the grades they get |
I believe that my country，Poland，is a perfect example for a place where food is particularly important. When we were little children, we began to understand how much a loaf of bread meant to our parents—to some it might sound silly but for me the custom of kissing bread before you started cutting it was simply amazing. It’s not so common nowadays to treat food that way，since you hardly ever bake your own bread. Besides, everyone would call you crazy if you tried to kiss every bread roll before you ate them! But though we no longer make our food from scratch (起点), some customs have been kept—that’s why I feel so sorry every time I have to throw any food away—even though I no longer live with my parents and nobody would blame me for this anymore!
Many people of our nation are still working as farmers, eating what they grow and harvest and therefore enjoying everything more. It’s widely known that you value more anything that needs your effort in the first place. In most homes in Poland, especially those of farmers, the whole family would try and have their meals together—extremely difficult now, but so rewarding! You can share other members’ troubles and successes, give your children some attention, or just sit down for a moment, instead of rushing through life aimlessly. Furthermore, your body，and stomach in particular will be very grateful for such a time!
In Poland, a wedding，Christmas or even a birthday is celebrated with a great meal. Women in the house get together and cook ,sometimes for a few days before the event，and the extremely good or unusual food will be remembered and widely talked about.
You cannot over-value the importance of food in the country. What’s more, almost everyone in Poland will be as interested in the topic as I am.When the writer was a child, he/she _______.
| A．found people were crazy about bread |
| B．began to realize the importance of food |
| C．thought that cutting bread was amazing |
| D．learned people hardly baked their own bread |
The writer feels very sorry when he/she has to throw away any food because___________.
| A．he/she makes food from scratch |
| B．his/her parents would blame him/her |
| C．some customs still have effect on him/her |
| D．many people are still working hard as farmers |
From the text, we can learn that, in Poland, ________.
| A．most meals can be interesting topics for a long time |
| B．the whole family often have meals together nowadays |
| C．it’s common for women to get together to cook for a few days |
| D．family members can know more about each other by having meals together |
Proudly reading my words, I glanced around the room, only to find my classmates bearing big smiles on their faces and tears in their eyes. Confused, I glanced toward my stone-faced teacher. Having no choice, I slowly raised the report I had slaved over, hoping to hide myself. “What could be causing everyone to act this way?”
Quickly, I flashed back to the day Miss Lancelot gave me the task. This was the first real talk I received in my new school. It seemed simple: go on the Internet and find information about a man named George Washington. Since my idea of history came from an ancient teacher in my home country, I had never heard of that name before. As I searched the name of this fellow, it became evident that there were two people bearing the same name who looked completely different! One invented hundreds of uses for peanuts, while the other led some sort of army across America. I stared at the screen, wondering which one my teacher meant. I called my grandfather for a golden piece of advice; flip (掷) a coin. Heads—the commander, and tails—the peanuts guy. Ah! Tails, my report would be about the great man who invented peanut butter, George Washington Carver.
Weeks later, standing before this unfriendly mass, I was totally lost. Oh well, I lowered the paper and sat down at my desk, burning to find out what I had done wrong. As a classmate began his report, it all became clear, “My report is on George Washington, the man who started the American Revolution.” The whole world became quite! How could I know that she meant that George Washington?
Obviously, my grade was awful. Heartbroken but fearless, I decided to turn this around. I talked to Miss Lancelot, but she insisted: No re-dos; no new grade. I felt that the punishment was not justified, and I believed I deserved a second chance. Consequently, I threw myself heartily into my work for the rest of the school year. Ten months later, that chance unfolded as I found myself sitting in the headmaster’s office with my grandfather, now having an entirely different conversation. I smiled and flashed back to the embarrassing moment at the beginning of the year as the headmaster informed me of my option to skip the sixth grade. Justice is sweet! What did the author’s classmates think about his report?
| A．interesting | B．ridiculous. |
| C．boring. | D．puzzling. |
Why was the author confused about the task?
| A．He was unfamiliar with American history. |
| B．He followed the advice and flipped a coin. |
| C．He forgot his teacher’s instruction. |
| D．He was new at the school. |
The underlined word “burning” in Para. 3 probably means _______.
| A．annoyed | B．ashamed | C．ready | D．eager |
In the end, the author turned things around _______.
| A．by redoing his task |
| B．through his own efforts |
| C．with the help of his grandfather |
| D．under the guidance of his headmaster |
Recordings of angry bees are enough to send big, tough African elephants running away, a new study says. Beehives (蜂窝)—either recorded or real—may even prevent elephants from damaging farmer’s crops.
In 2002, scientist Lucy King and her team found that elephants avoid certain trees with bees living in them. Today, Lucy wants to see if African honeybees might discourage elephants from eating crops. But before she asked farmer to go to the trouble of setting up beehives on their farms, she needed to find out if the bees would scare elephants away.
Lucy found a wild beehive inside a tree in northern Kenya and set up a recorder. Then she threw a stone into the beehive, which burst into life. Lucy and her assistant hid in their car until the angry bees had calmed down. Next，Lucy searched out elephant families in Samburu National Reserve in northern Kenya and put a speaker in a tree close to each family.
From a distance, Lucy switched on the pre-recorded sound of angry bees while at the same time recording the elephants with a video camera. Half the elephant groups left the area within ten seconds. Out of a total of 17 groups, only one group ignored the sound of the angry bees. Lucy reported that all the young elephants immediately ran to their mothers to hide under them. When Lucy played the sound of a waterfall (瀑布) instead of the angry bees to many of the same elephant families, the animals were undisturbed. Even after four minutes, most of the groups stayed in one place.
Lucy is now studying whether the elephants will continue to avoid the sound of angry bees after hearing it several times. She hasn’t tested enough groups yet to know, but her initial (最初的) results were promising enough to begin trials with farmers. She has now begun placing speakers in the fields to see if elephants are frightened away.
We know from the passage that elephants may be frightened of .
| A．loud noises | B．some crops |
| C．video cameras | D．angry bees |
As mentioned in the passage, Lucy .
| A．works by herself in Africa |
| B．needs to test more elephant groups |
| C．has stopped elephants eating crops |
| D．has got farmers to set up beehives on their farms |
Why did Lucy throw a stone into a wild beehive?
| A．To record the sound of bees. |
| B．To make a video of elephants. |
| C．To see if elephants would run away. |
| D．To find out more about the behavior of bees. |
Which of the following is true according to the passage?
| A．Young elephants ignore African honeybees. |
| B．Waterfalls can make elephants stay in one place. |
| C．Elephants do not go near trees with bees living in them. |
| D．Farmers do not allow Lucy to conduct tests in their fields. |
One day, I received a call from a colleague. He was about to give a student a zero for his answer to a physical problem, while the student claimed a perfect score. I was elected as their arbiter（仲裁人）. I read the examination problem: “Show how it is possible to determine the height of a tall building with the aid of a barometer（气压计）. ”The student had answered; "Take the barometer to the top of the building, attach a long rope to it, lower it to the street, and then bring it up, measuring the length of the rope. The length of it is the height of the building.”
The student had really answered the question completely, but the answer didn't confirm his competence in physics. I suggested the student try again. I gave him six minutes to answer the question, warning that the answer should show some knowledge of physics. Five minutes later, he said he had many answers and dashed off one, which read：“Take the barometer to the top of the building and lean over the edge of the roof. Drop the barometer, timing its fall with a stopwatch. Then, use the physical formula（公式）to calculate the height of the building.”
At this point, my colleague had to accept it, and then the student made almost full marks. I couldn't help asking the student what the other answers were. He listed many others, and then added, "Probably the best is to take the barometer to the administrator and said to him, ‘Sir, here is a fine barometer. If you tell me the height of the building, I will give it to you.”,
Then, I asked the student if he really did not know the conventional answer to this question. He admitted that he did, but said that he was fed up with high school and college instructors trying to teach him how to think.
The name of the student was Bohr who later was famous all over the world. He won the Nobel Prize for Physics in 1922.The student got a zero at the beginning because _____.
| A．the teacher wasn't satisfied with him |
| B．his answer wasn't complete or correct |
| C．the teacher didn't fully understand his answer |
| D．his answer didn't show his knowledge of physics |
We know from the passage that _____.
| A．the student knew the expected answer |
| B．the administrator told Bohr the height |
| C．the author preferred Bohr's last answer |
| D．the teacher was a very stubborn person |
We can learn from the passage that _____.
| A．instructors can teach students how to think |
| B．arbiters can help students to get high scores |
| C．students should be given more freedom in thinking |
| D．teachers should make students use physical formulas |
What was Bohr's attitude toward his schooling?
| A．Optimistic | B．Critical | C．Approving | D．Neutral |
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