He is rather difficult to make friends with, but his friendship,（)gained is more true than any other's.

A . 正确 B . 错误

A．evaluate B．comment C．discuss D．report

A. as B. for C. at D. in

A．put B．carry C．lift D．fit

A、when B、that C、which D、what

Few doctors believe any longer that it is simply a question of will power. And for those people that continue to view addicts as merely "weak", recent genetic research may force a rethink. A study conducted by Jacqueline Vink, of the Free University of Amsterdam, used a database called the Netherlands Twin Register to analyze the smoking habits of twins. Her results, published in the Pharmacogenomics Journal, suggest that an individual's degree of nicotine dependence, and even the number of cigarettes he smokes per day, are strongly genetically influenced. The Netherlands Twin Register is a voluntary database that contains details of some 7,000 pairs of adult twins (aged between 15 and 70) and 28,000 pairs of childhood twins. Such databases are prized by geneticists because they allow the comparison of identical twins (who share all their genes) with fraternal twins (who share half). In this case, however, Dr. Vink did not make use of that fact. For her, the database was merely a convenient repository of information. Instead of comparing identical and fraternal twins, she concentrated on the adult fraternal twins, most of whom had completed questionnaires about their habits, including smoking, and 536 of whom had given DNA samples to the register. The human genome is huge. It consists of billions of DNA "letters", some of which can be strung together to make sense (the genes) but many of which have either no function, or an unknown function, To follow what is going on, geneticists rely on markers they have identified within the genome. These are places where the genetic letters may vary between individuals. If a particular variant is routinely associated with a particular physical feature or a behavior. pattern, it suggests that a particular version of a nearby gene is influencing that feature or behavior. Dr. Vink found four markers which seemed to be associated with smoking. They were on chromosomes 3, 6, 10 and 14, suggesting that at least four genes are involved. Dr. Vink hopes that finding genes responsible for nicotine dependence will make it possible to identify the causes of such dependence. That will help to classify smokers better (some are social smokers while others are physically addicted) and thus enable "quitting" programs to be customized. Results such as Dr. Vink's must be interpreted with care. Association studies, as such projects are known, have a disturbing habit of disappearing, as it were, in a puff of smoke when someone tries to replicate them. But if Dr. Vink really has exposed a genetic link with addiction, then Mark Twain's problem may eventually become a thing of the past. Mark Twain is mentioned in the passage in order to show that A．he is a man with very Strong will power. B．it is easy to give up smoking temporarily. C．famous writers are often heavy smokers. D．only few people have his determination.

A．They appear to demonstrate parasitic behavior. B．Their behavior. can be both harmless and helpful. C．They derive various benefits from their hosts. D．Researchers have inadequate observational equipment.

【77】 Instead of trying to make gradual changes in small increments, make big changes. After all, big changes are relatively easier to make than are small ones. Some people assume that the way to bring about improvement is to make the change small enough so that nobody will notice it. This approach has never worked, and one can' t help but wonder why such thinking continues. Everyone knows how to resist small changes; they do it all the time. If, however, the change is big enough, resistance can' t be mobilized against it.【78】 Management can make a sweeping organizational change, but just let a manager, try to change someone' s desk from here to there, and see the great difficulty he encounters. All change is resisted, so the question is how can the changes be made big enough so that they have a chance of succeeding？ Buck Minster Fuller has said that instead of reforms society needs new forms; e. g. , in order to reduce traffic accidents, improve automobiles and highways instead of trying to improve drivers. The same concept should be applied to human relations. There' s a need to think in terms of social architecture, and to provide arrangements among people that evoke what they really want to see in them selves.【79】 Mankind takes great pains with physical architecture, and is beginning to concern it self with the design of systems in which the human being is a component. But most of these designs are only for safety, efficiency, or productivity. System designs are not made to affect those aspects of life people care most about such as family life, romance, and esthetic experiences.【80】 Social technology as well as physical technology need to be applied in making human arrangements that will transcend anything mankind has yet experienced. People need not be victimized by their environments; they can be fulfilled by them. (76)

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A．A.Any I’d rather he ____ me the trut B．B.Will; informed C．C.Shall; told D．D.Should; will tell E．E.Can; covers

A．He does not earn as much money as his classmates． B．He does not work as well as his classmates． C．He does not get enough pay for his ’hard work． D．He does not have enough time for his study．

There was a certain artist who was always very careful to pay the proper amount. One year, after posting his check as usual, he began to wonder if he had paid enough, and after a lot of work, with a pencil and paper, he decided that he had not.He believed that he owed the government something. He was just writing another check to send to the tax-collector when the postman dropped a letter into the box at the front door.Opening it, the artist was surprised to find inside it a check for five pounds from the tax-collector.The official explained that too much had been paid, and that therefore the difference was now returned to the taxpayer. 21.It is mentioned in the passage that one has to pay tax according to(). A.how much education one has received B.whether one is single or married C.how old one's children are 22.The underlined word "proper" in the second paragraph means(). A.small B.big C.right 23.After a lot of work, the artist thought that he had paid the government() A.less tax than he should have B.more tax than he should have C.as much tax as usual 24.What did the artist receive() A.A check from the bank clerk. B.A check from the tax-collector. C.A gift from the tax-collector. 25.Why did that tax-collector send a letter to the artist() A.To send him a new tax form. B.To return the money over-paid. C.To remind him of paying the tax.

One year，after posting his check as usual，he began to wonder if he had paid enough，and after a lot of work，with a pencil and paper，he found that he had not. He thought that he owed the government something. He was just writing another check to send it to the tax collector when the postman dropped a letter into the box at the front door. Opening it，the artist was surprised to find inside it a check for five pounds from the tax collector. The official explained that too much had been paid，and that therefore the difference was now returned to the taxpayer. 11. According to the passage，to decide the exact amount of tax to be paid is ____________. A. simple B. easy C. difficult D. interesting 12. It is mentioned in the passage that one has to pay tax according to ____________. A. how much education one has received B. whether one is single or married C. how old one’s children are D. where one lives 13. The word “proper” in the second paragraph means __________. A. small B. big C. right D. wrong 14. After a lot of work，the artist thought that he had paid the government ____________. A. less tax than he should have B. more tax than he should have C. as much tax as usual D. just enough tax 15. Why did the tax collector send a letter to the artist？ A. To send him a new tax form. B. To return the money overpaid. C. To remind him of paying the tax. D. To explain the rules of tax paying.