1．According to this passage, when you are in a state of subhealth, you should　　　 .

　　　 A．stay home and keep silent　　

B．go to see a doctor and buy some medicine.

　　　 C．have yourself examined in foreign countries

　　　 D．find out the reasons and relax yourself

20．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 .

19．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

18．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

17．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

16．What is the best title for this article ?

　　　 A．Everyone Lies at Present 　　　　　　

B．Lying With the Truth

　　　 C．Try to Be Honest to the People 　　　

D．Don’t Believe People Who Tell the Truth

E

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 .

15．The writer suggests in this article that people should 　　　　　.

　　　 A．believe in nobody　　　　　　　 　　B．vote for female candidates

　　　 C．stay away from political campaigns 　D．think carefully about what they read and hear

14．What does the underlined word “deceive” probably mean ?

　　　 A．tell　　　　　　　　　　 B．explain 　　　　　　 C．fool 　　　　　　　　　 D．win

13．Which of the statements is true according to the article ?

　　　 A．All advertisements are lies .　　 　　　　　　　

B．You can’t trust anyone who tells the truth .

　　　 C．The truth can be used in dishonest ways .

　　　 D．Whenever people tell the truth , they are really lying .

12．How many students mention the culture difference they have experienced ?

　　　 A．Three .　　　　　　　 B．Four .　　　　　　　　 C．Five .　　　　　　　　 D．Six .

D

　 Take care about those who use the truth to deceive. When someone tells you something that is true , but leaves out important information that should be included , he can make a false impression . For example , someone might say, “I just won a hundred dollars on the lottery . It was great . I took that dollar ticket back to the store and turned it in for one hundred dollars !”

This guy is a winner , right ? Maybe , maybe not . We then discovered that he bought two hundred tickets , and only one was a winner .He is really a big loser ! He didn’t say anything that was false , but he intentionally left out important information . That’s called a half-truth . Half truths are not technically lies , but they are just as dishonest .

Untrustworthy candidates(候选人)in political campaigns often use this trick . Let’say that during Governor Smith’s last term , her state lost one million jobs and gained three million jobs . Then she seeks another term . One of her opponents (对手) runs and ad. saying , “During Governor Smith’s term , the state lost one million jobs !” That’s true . However ,an honest statement would have been , “During Governor Smith’s term, the state had a net gain of two million jobs .”

Advertisers will sometimes use half-truths . It’s against the law to make false statements so they try to mislead you with the truth . An ad might boast (吹嘘), “Nine out of ten-doctors recommend Yucky Pills to cure nose pimples.” It fails to mention that they only asked ten doctors and nine of them work for the Yucky Corporation .

This kind of trick happens too often . It’s a sad fact of life: Lies are lies ,and sometimes the truth can lie as well .