NOT all memories are sweet. Some people -- all their lives trying to forget bad experiences. Violence and traffic accidents can leave people with terrible physical and emotional scars (伤痕).

Now American researchers think they are close to developing a pill, which will help people forget bad memories. The pill is designed to be taken immediately after a frightening experience. They hope it might reduce, or possibly erase, the effect of painful memories.

In November, experts tested a drug on people in the US and France. The drug stops the body producing chemicals that fix memories in the brain (大脑). So far the research has suggested that only the emotional effects of memories may be reduced, not that the memories are erased.

The research has caused a great deal of discussion. Some think it is a bad idea, while others support it.

Supporters say it could lead to pills that prevent or treat soldiers' troubling memories after war. They say that there are many people who suffer from terrible memories.

"Some memories can destroy people's lives. They come back to you when you don't want to have them in a daydream or nightmare (噩梦). They usually come with very painful emotions," said Roger Pitman, a professor of psychiatry at Harvard Medical School. "This could relieve a lot of that suffering."

But those who are against the research say that changing memories is very dangerous because memories give us our identity (特质). They also help us all avoid the mistakes of the past.

"All of us can think of bad events in our lives that were horrible at the time but make us who we are. I'm not sure we want to wipe those memories out, "said Rebecca Dresser, a medical ethicist.

1.The passage is mainly about          

A．a new medical invention

B．a new research on the pill

C．a way of erasing painful memories

D．a discussion about the research on the pill

2.The drug tested on people can           

A．cause the brain to fix memories

B．stop people remembering bad experiences

C．prevent body producing certain chemicals

D．erase the emotional effects of memories

3.We can infer from the passage that            

A．people doubt the effects of the pills

B．the pill will stop people's bad experiences

C．taking the pill will do harm to people's health

D．the pill has probably been produced in America

4.Which of the following does Rebecca Dresser agree with?

A．Some memories can destroy people's lives.

B．People want to remove bad memories.

C．Experiencing bad events makes us different from others.

D．The pill will reduce people's sufferings from bad memories.

Everyone is talking about bird flu. Yes, it is a very dangerous illness that could make people very sick. It will be some months still before we have good medicine 1 bird flu. But that doesn’t  mean you can’t do anything to prevent（预防）it now.   So far, all the people who have caught bird flu have been those who touched sick chickens or their  2 . So it’s a good idea for people  3 living chickens.
“People  4  go to the markets to buy living chickens to eat, but now they have to change  that habit（习惯）,” said Peter Cordingley, a WHO expert（专家）. But if you do touch a sick bird, remember 5 your hands carefully with soap right away .  Experts also say having good habits and a healthy body will help you  6  safe from bird flu. For example, do not buy or eat birds that    7  . Do not eat anything that has touched raw（生的） meat. Also, don’t forget to open your windows often and exercise every day.   8  enough sleep is also very important for beating illness. If you feel sick, see a doctor as soon as possible. 9 , no one in China has bird flu. But WHO says children under 12 years old could easily get sick with bird flu. Try to stay away from people who have the flu, and always cover your mouth and nose when you 10  .

A student newspaper reports that most students go to sleep at 1:30 am. Even if that’s an overstatement (夸张), it’s close to the truth. Scientists say teens should sleep nine hours each night. But that’s hard. Some are even “pulling all-nighters” (开夜车). These students must hand in their homework the next day but they haven’t done it. In the morning they don’t look healthy and you can tell who’s been doing it. One of my classmates did a survey on the topic. She found that most kids pull all-nighters to finish homework, but some do it for other reasons, such as playing computer games!

    Maybe our lack(缺乏) of sleep is because of laziness — I think I’m a rather lazy student — or maybe it’s because we have too much to do in American high schools. I usually go to bed around midnight. If I stayed up past 1:30 am, I wouldn’t get any work done. I’d be falling asleep at my computer. My classes begin at 7:30 am. I’m partly awake in my first class. By the second, I’m a little sleepy. By my third class, I’m sleepy. By midday I’m finally fully awake. But by 3:00 pm, I’m slowing down again. Yet I get more sleep than usual students.

    Most American high schools seem to have a similar(相似的) problem with sleepy students. High school classes start at 7:30 am, so students have to get up one and a half hours before that to get ready and catch the bus. It’s believed that lack of sleep can be bad for both grades and health. Some schools are paying attention. Classes in those schools start at 8:30 am.

1.What does the underlined sentence “it’s close to the truth” mean?

A. It doesn’t tell the truth.         B. It is quite true.

C. It is impossible.              D. I don’t think it’s right.

2.Why do most of the teens have to stay up late?

A. They play computer games.             B. They watch videos late.

C. They have to do a lot of housework.      D. They have to do a lot of homework.

3.When do students in most American high schools have to get up?

A. At 7:30 am.     B. At 6:00 am.    C. At 9:00 am.    D. At about 7:00 am.

4.Which of the following is TRUE according to the reading?

A. The writer usually stays up past 1:30 am.

B. The writer usually goes to bed around midnight.

C. The writer usually does a survey.

D. Many American students don’t get enough sleep, so they can have high grades.

5.What’s the main idea of the passage?

A. Something has to be done to solve the problem of students’ lack of sleep.

B. Many American high school students are sleepy in class.

C. Many kids have too much homework to do.

D. Students can’t play computer games.

China's long-awaited rules on school bus safety finally came into force on Tuesday, including a list of ways aimed at reducing the risk of accident.
Among the biggest changes is that buses carrying students will be given priority(优先权) in traffic, while companies and drivers will need licenses to offer school transport services.
Officials have spent more than four months making the rules, during which time the country has been shocked by several big crashes because of overcrowded school buses.
The latest accident happened on Monday in Yangchun, Guangdong province, in which three kindergarten pupils were killed and 14 others injured.
Rules and funding
In the new rules, a school bus is considered as a vehicle with more than seven seats that is transporting children receiving the State's nine-year compulsory education (ages 6 to 15) to or from school. This can also be for preschoolers(学龄前儿童) if a parent is unable to take them to or from kindergarten（幼儿园）.
School buses must also operate in routes marked in the map by governments to ensure safety.
Punishment
Companies and bus drivers who fail to meet the rules face the punishment.
Drivers against the rules will be fined 200 yuan ($32) and vehicles will be taken away from its owner if they have been used as an unlicensed school bus.
【小题1】New safety rules for school buses can ________.

　When I was at university，I studied very hard．But a lot of my friends did very little work．Some did just enough to pass exams．Others didn’t do quite enough．Fred Baines was one of them．He spent more time drinking in the Students’ Union than working in the library．
　　Once at the end of the term，we had to take an important test in chemistry．The test had a hundred questions. In my room the night before the test，Fred was watching TV．Fred usually worried a lot the night before a test．But on that night he looked perfectly calm．Then he told me of his plan．“It’s very simple．There are a hundred questions and I have to get fifty correct to pass the test．I’ll take a coin into the examination room．I haven’t studied a chemistry book for months，so I’ll just toss the coin．That way，I’m sure I’ll get half the questions right．”
　　The next day，Fred came happily into the exam room．As he sat tossing a coin for half an hour he marked down his answers．Then he left，half an hour before the rest of us．
　　The next day，he saw the chemistry professor in the corridor．“Oh，good，”he said，“Have you got the result of the test?”The professor looked at him and smiled，“Ah，it’s you，Baines．Just a minute．”Then he reached into his pocket and took out a coin．He threw it into the air，caught it in his hand and looked at it．
　　“I’m terribly sorry，Baines，”he said，“You failed!”
【小题1】This story mainly wants to tell us ________．