A new study says one part of the human brain may become smaller as the result of a condition known as jet lag. Jet lag results from flying long distances in an airplane. People with jet lag may feel extremely tired for several days. They may also have problems thinking clearly and remembering.

Recently a researcher at the University of Bristol in Britain reported the findings of his jet lag study, which involved twenty young women who worked for international airlines. They had served passengers on airplanes for five years. These flight attendants flew across many countries and at least seven time zones. In the study, the flight attendants had different amounts of time to recover from jet lag. Half the women spent five days or fewer in their home areas between long flights The other half spent more than fourteen days in their home areas.

The researcher took some saliva from the women's mouths to measure levels of a hormone(荷尔蒙) that increases during stress (紧张). He tested them to see if they could remember where black spots appeared on a computer screen. And he took pictures of their brains to measure the size of the brain's temporal lobes (脑叶).

It was found that the women who had less time between flights had smaller right temporal lobes. This area of the brain deals with recognizing and remembering what is seen. The same group performed worse and had slower reaction times on the visual memory test. And their saliva samples showed higher levels of stress hormones.

The researcher believes the brain needs at least ten days to recover after a long trip. He says airline workers told him their ability to remember got worse after working on planes for about four years. Other studies have shown that increased feelings of stress can cause a loss of cells in the part of the brain that controls memory.

Scientists say more tests are needed to study the effects of jet lag on the brain. They want to find out if too much jet lag could permanently (永久性的) affect memory.

According to the text, jet lag _________.

A. can cause difficulties in speaking

B. can make people feel tired for a few weeks

C. can be only found in flight attendants

D. can be caused by flying over several time zones

It can be inferred from the text that _________.

A. the conclusion is refused by many scientists

B. scientists fear that this research is not done properly

C. every scientific conclusion needs the support from many tests

D. the women who were examined in the research were not healthy

From the result of the research we can see that _________.

A. the women who have longer rest at home show better memory

B. the women who fly in short time have smaller right temporal lobes

C. the women who have longer flights fail the memory test

D. the women who rest more than 14 days produce less hormones

What is the subject discussed in the text?

A. The cause of jet lag.      B. A story of a group of flight attendants.

C. The importance of having enough rest after flights.

D. A research about the effects of jet lag on the brain.

A senior United Nations Children’s Fund(UNICEF) official on May 29 praised China for its remarkable achievements in children’s welfare.

A. H. M. Farook, UNICEF’s operations area officer for China and Mongolia said that China “can be very satisfied to tell the whole world what can be done with limited resources to help its children to grow healthily and happily.”

　　China’s child population makes up one-fifth of the world’s total. “The reason behind the tremendous(巨大的) achievement is China’s long tradition of caring for children both at home and in society,” he said.

　　“What’s more is that Chinese people have always given special attention to children who are in special need.” The UN official made the remarks when addressing a group of 50 children and staff from the Beijing Children’s Welfare Home at the Shangri-la Hotel, Beijing.

　　The hotel invited the orphans to share snacks, sing, dance and play games at a park inside the hotel for a “Share the Sunshine” party, as a prelude(前奏) to celebrations to mark the Children’s Day.

　　The Beijing children’s Welfare Home, set up soon after New China was founded in 1949, has at present more than 400 children.

　　A leading official of the welfare institution said that the children live a happy life and that the agency spends 400—500 yuan a month for an average orphan. An average Chinese workers earned 440 yuan a month during the first quarter this year.

　　Gu Xiaojin, deputy secretary-general of the China Youth Development Foundation(CYDF), said people from all walks of life have contributed to the welfare of the Chinese children.

　　She said that CYDF set up the Project Hope in 1989, which calls on people across the country to donate money to help poor children to continue their schooling.

　　By the end of last year, she said, CYDF had collected nearly 700 million yuan in donations, which has helped the establishment of 2, 074 Hope primary schools and enabled more than 1. 25 million dropouts to return to school classrooms.

　　Three “Hope Stars” also attended the party. They were model teenagers chosen among students who are economically supported by the Project Hope to further their nine-year compulsory studies in the poverty-stricken regions. They will be torchbearers for the Chinese Team for the up coming Atlanta Olympic Games this year.

Children can grow healthily and happily as long as _______.

A. parents take good care of them both at home and in society

B. the whole society care for children as well as their parents

C. Schools and teachers pay much attention to the growth of children

D. Chinese people always give special attention to children who are in special need

Every year the Beijing Children’s Welfare Home spends _______ on the orphans

A. 1, 920, 000 yuan 　　　　　 　　              B. 2, 160, 000 yuan

C. Over 2, 400, 000 yuan 　　　　　        D. 2, 200, 000 yuan or so

CYDF collected 700 million yuan with the purpose of _______.

A. reducing dropouts                               

B. helping homeless orphans

C. supporting the Chinese Team for the coming Atlanta Olympic Games

D. establishing 2, 074 Hope primary schools all over the country

We can infer from the text that _______.

A. Every Chinese child has its own special need, so we should pay special attention to each.

B. All the children in the poverty-stricken regions of China are too poor to go to school.

C. Ever since liberation. the Chinese Communist Party has been concerned about the growth of the younger generation.

D. With the help of UNICEF officials, there are no more dropouts in China.

It is possible that this passage was written in _______.

A. 1992 　　　　  B. 1996 　　　　  C. 1998 　　　　   D. 2000

To what degree can a computer achieve intelligence ? The answer to this question may lie in a newly-developed US computer program called Smarter Child and the Internet .

If you ran into Smarter Child online , you would be surprised at this kid’s huge memory .It can recite many facts . For example , Smarter Child knows every baseball player in every team this season .

He knows every word in the dictionary and the weather in every major city areas across the US. However , if you ask Smarter Child other questions , you get stranger answers . A question about Smarter Child’s age returns . “One year , 11 days , 16 hours , 7 minutes , and 47 seconds!” Asking where he lives gets , “In a clean room in a high-tech building in California.”

Smarter Child uses the vast information on the World Wide Web as his memory bank . To answer questions about spelling , for instance , Smarter Child goes to American Heritage Dictionary online . For the weather , he visits www.intellicast.com.

Some scientists believe that by joining the many systems of the Internet , an artificial being with the combined knowledge of , say , Albert Einstein, Richard Nixon and Britney Spears could be born. However  if Smarter Child wants to think and learn on his own like the boy-computer David in the movie A. I. , Artificial Intelligence , he must overcome two problems .

The first is that computers find it difficult to read web pages because the files are labeled in different ways . That’s why programmers need to tell Smarter Child where to look for the weather . It would be a much more difficult task to let him find it himself .

Another problem is that while Smarter Child can process (处理) information more exactly and faster than any human , he lacks common sense—a basic grounding of knowledge that is obvious to any young child .

From the text we can infer that www.intellicast.com is a website          .

       A．which is specially designed to help Smarter Child .

       B．where we people can find Smarter Child

       C．where weather forecasts are made

       D．which is about artificial intelligence

It is probably most difficult for Smarter Child to          .

       A．tell us how to spell a difficult word

       B．tell us show the American government is run

       C．provide us with a famous poem by Shakespeare

       D．learn the ability to tell right behaviors from wrong ones .

Which of the following is TRUE according to the text ?

       A．Smart Child has his own memory bank big enough for all kinds of information .

       B．A.I. Artificial Intelligence is probably the name of a film about a boy-computer .

       C．Smart Child can recognize different files and find information needed on his own .

       D．We have similar product now which ahs the knowledge of Einstein , Nixon and Spears.

Which of the following is the bet title for the passage ?

       A．A New Web Child   B．Smarter Child

       C．The Future of Internet    D．Intelligence Development

A caring mother is the single most important factor in preventing teenagers from abusing(滥用)drugs and alcohol，researchers said on Friday. An international study showed that teenagers living with both parents are less likely to suffer from alcohol and drug problems，and a strong maternal bond is the most effective way to fight against them.

  “These findings suggest that living with both parents may prevent drug use．”said Dr.McArdle，of Newcastle University in northern England, who led the study. “They also suggest that attachment(感情眷念)，particularly to mothers，is a more effective factor and that this is truly across cultures and substances.” The report, which is published in the journal Addiction, involved nearly 4,000 teenagers in England，Ireland，Italy，Germany and the Netherlands. They were questioned about their use of several kinds of drugs and alcohol. The teenagers also filled in questionnaires about their relationship with their parents and grandparents, how well they were supervised(监护)after school and whether they were allowed to meet friends at home.

  “Both the quality of family relationships and the structure of families have significant influences on youth drug use,” McArdle said in a statement. But he added that a strong maternal bond offered the greatest protection against developing drug habits. The rate of drug abuse among teenagers living with both parents and who had a good relationship with their mother was 16.6 percent. If either factor was missing, the drug abuse rate rose to 32 percent．More than 42 percent of teenagers living in one parent families who did not have a strong bond with their mother used drugs．

  Drug prevention campaigns in British schools and on television warn teenagers about the danger of drugs and alcohol but McArdle said no one is dealing with the problem of their parents’ responsibility                            

The phrase“maternal bond” appears twice in this passage. Guess its meaning__________．

A.物质的奖励             B.母亲的约束             C．法律的制裁            D.学校的指导

According to McArdle,which is most likely to have the drug abuse problem_________?

A.16-year-old Tom from a happy big family             

B.17-year-old Kate supervised by her single mother．

C.18-year-old Juliet living with her single father．      

D.19-year-old Mark cared by his parents.

Which of the following is NOT mentioned in the passage__________?

A. Teenagers with both parents won’t have the drug use problem.

B. Teenagers from several countries filled in the questionnaire.

C. Teenagers were asked about their relationship with parents．

D. Teenagers in British schools are warned against drugs abuse.

The last paragraph suggests that________.

A. schools should answer for the drug problem             

B. television and media are to blame

C. parents and the society are responsible for the drug problem

D. mothers are the cause of youth drug use．

To what degree can a computer achieve intelligence? The answer to this question may lie in a newly-developed US computer program called Smarter Child and the Internet.

If you ran into Smarter Child online, you would be surprised at this kid’s huge memory. It can recite many facts. For example, Smarter Child knows every baseball player in every team this season.

He knows every word in the dictionary and the weather in every major city areas across the US. However, if you ask Smarter Child other questions, you get strange answers. A question about Smarter Child’s age returns. “One year, 11 days, 16 hours, 7 minutes, and 47 seconds!” Asking where he lives，you get, “In a clean room in a high-tech building in California.”

Smarter Child uses the vast information on the World Wide Web as his memory bank. To answer questions about spelling, for instance, Smarter Child goes to American Heritage Dictionary online. For the weather, he visits www.intellicast.com.

Some scientists believe that by joining the many systems of the Internet, an artificial being with the combined knowledge of, say, Albert Einstein, Richard Nixon and Britney Spears can be born. However, if Smarter Child wants to think and learn on his own like the boy-computer David in the movie A. I. (Artificial Intelligence), he must overcome two problems.

The first is that computers find it difficult to read web pages because the files are labeled in different ways. That’s why programmers need to tell Smarter Child where to look for the weather. It would be a much more difficult task to let him find it himself.

Another problem is that while Smarter Child can process information more exactly and faster than any human, he lacks common sense—a basic grounding of knowledge that is obvious to any young child.

From the text we can infer that www.intellicast.com is a website          .

A. which is specially designed to help Smarter Child

B. where we people can find Smarter Child

C. where weather forecasts are made

D. which is about artificial intelligence

It is probably most difficult for Smarter Child to         .

A. tell us how to spell a difficult word     

B. tell us how the American government is run

C. provide us with a famous poem by Shakespeare

D. learn the ability to tell right behaviors from wrong ones

Which of the following is TRUE according to the text?

A. Smart Child has his own memory bank big enough for all kinds of information.

B. A.I. (Artificial Intelligence) is probably the name of a film about a boy-computer.

C. Smart Child can recognize different files and find information needed on his own.

D. We have similar product now which has the knowledge of Einstein, Nixon and Spears.

Which of the following is the best title for the passage?

A. A New Web Child            B. Smarter Child

C. The Future of Internet             D. Intelligence Development