72. 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

64. The purpose in writing this text is _________. 　A．to encourage people to recycle their rubbish 　B．to introduce a recycling system for high rises 　C．to describe the use of computer technology in recycling 　D．to explain the need for rubbish collection in high rises 65. When he says "You won't be for long" the writer means that _______. 　A．you'll soon be living in a cleaner building 　B．rubbish chutes will become out of date before long 　C．you won't wait long for your turn to recycle rubbish 　D．it won't be long before you'll have to recycle your rubbish 66. Before dropping rubbish into the chute you have to ___________ 　A．lock the other floors' chute doors　　　 B．check if the container is full 　C．press the correct button　　　　　　　 D．break up the rubbish 67. The biggest advantage of this new system is that _________ 　A．it reduces the cost of recycling　　 　 B．it saves time and space 　C．it saves money for people living in high rises 　D．it makes better use of the existing recovery equipment

D

Money spent on advertising is money spent as well as any I know of. It serves directly to bring about a rapid sale of goods at reasonable prices, so setting up a firm home market and making it possible to provide for export (出口) at good prices. By drawing attention to new ideas it helps greatly to raise standards of living. By helping to increase demand it causes an increased need for labour, and is therefore a nice way to fight unemployment. It lowers the costs of many services: without advertisements your daily newspaper would cost four times as much, the price of your television program would need to be doubled, and travel by bus or subway would cost more. 　And perhaps most important of all, advertising provides a promise of reasonable value in the products and services you buy. Besides the fact that twenty-seven Acts of Parliament(国会)govern the terms of advertising, no regular advertiser dare produce anything that fails to live up to the promise of his advertisements. He might fool some people for a little while through misleading advertising. He will not do so for long, for the public has the good sense not to buy the poor goods more than once. If you see product frequently advertised, it is the proof I know that the product does what is promised for it, and that it has good value. 　Advertising does more for the good of the public than any other force I can think of. 　There is one more point I feel I ought to touch on. Recently I heard a well-known television person declared that he was against advertising because it persuades rather than informs. He was telling us the real difference. Of course advertising tries to persuade. 　If its message were nothing but information, that would be difficult to get more people to buy, for even the choice of the colour of a shirt is a bit persuasive (有说服力的)--advertising would be so boring that no one would pay any attention. But perhaps that is what the well-known television person wants. 68. By the first sentence of the passage the writer means that ___. 　 A. he is fairly familiar with the cost of advertising 　 B. everybody knows well that advertising is a waste of money 　 C. advertising costs more money than everything else 　 D. money on advertising is worth spending 69. In the passage, which of the following is NOT included in the advantages of advertising? 　 A. Getting greater fame.　　　　　　　 B. Providing more jobs. 　 C. Raising living standards.　　　　　 D. Reducing newspaper cost. 70. The writer thinks that the well-known TV person is _____. 　 A. quite right in passing his judgment on advertising 　 B. interested in nothing but the buyers' attention 　 C. correct in telling the difference between persuasion and information 　 D. obviously unfair in his views on advertising 71. In the writer's opinion, ________. 　 A. advertising can seldom bring material interest to man by providing information 　 B. advertising informs people of new ideas rather than wins them over 　 C. there is nothing wrong with advertising in persuading the buyer 　 D. the buyer is not interested in getting information from an advertisement

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.

25. I ____come yesterday, but I couldn’t.

A. was to have　 　　B. must　 　　C. ought　 　　D. have to

Keys: 1-5　 DDCCA　　　　 　6-10　 BAACB 　　　　　11-15　 ABDBD　

16-20　 BBDDC　　　　 21-25　 DDCCA

24.______I’d have told you.

A. If I would have known it　 　　　　B. If I had have known it

C. Had I known it　　　　　　　　 　D. should I know it

23.--Do you think the thief entered through the garage door?

--No, if he had, I don’t believe ____broken the living room window.

A. would he have　 　B. he had　 C. he would have　　 　　D. he has

22.--Why didn’t Tom give you one of his paintings?

--I didn’t want one, but he would have given me one if I _____.

A. do　　 B. would　 C. will　　 D. had

21.--Did you hand in your application for a league member?

--Not yet. If I _____to see my father, I would have.

A. didn’t go　 B. haven’t gone　 C. wouldn’t have gone　　 D. hadn’t gone

20. If you _____early tomorrow morning, you would be there by noon.

A. have started　　 B. were started　 C. were to start　　 D. had started

19. If I _____out of my ink, I would have finished writing the paper.

A. didn’t run　　 B. shouldn’t run　 　C. haven’t run　　 D. hadn’t run

18.--How do you like the party?

--Wonderful. If you had come with us, 　you ____a good time.

A. had　 　　B. had had　 　　　C. would have　 　D. would have had