单选题By the end of this week, he surely ______ a collection of 2020 stamps. A. have had B. will be having C. will have had D. will have

单选题Mum: Let"s go and see grandma some time during the break. Daughter: Great. What time? Mum: ______

单选题{{B}}16-20{{/B}} President Coolidge's statement, "The business of America is business," still points to an important truth today--that business institutions have more prestige (威望) in American society than any other kind of organization, including the government. Why do business institutions possess this great prestige? One reason is that Americans view business as being more firmly based on the ideal of competition than other institutions in society. Since competition is seen as the major source of progress and prosperity by most Americans, competitive business institutions are respected. Competition is not only good in itself, it is the means by which other basic American values such as individual freedom, equality of opportunity, and hard work are protected. Competition protects the freedom of the individual by ensuring that there is no monopoly (垄断) of power. In contrast to one, all-powerful government, many businesses compete against each other for profits. Theoretically, if one business tries to take unfair advantage of its customers, it will lose to competing business which treats its customers more fairly. Where many businesses compete for the customers' dollar, they cannot afford to treat them like inferiors or slaves. A contrast is often made between business, which is competitive, and government, which is a monopoly. Because business is competitive, many Americans believe that it is more supportive of freedom than government, even though government leaders are elected by the people and business leaders are not. Many Americans believe, then, that competition is as important, or even more important, than democracy in preserving freedom. Competition in business is also believed to strengthen the ideal of equality of opportunity. Competition is seen as an open and fair race where success goes to the swiftest person regardless of his or her social class background. Competitive success is commonly seen as the American alternative to social rank based on family background. Business is therefore viewed as an expression of the idea of equality of opportunity rather than the aristocratic (贵族的) idea of inherited privilege.

单选题The boy ______ by the peddler (贩子) to carry goods for him. A. made use of B. made used C. was made use D. was made use of

单选题Nancy. Have you heard about Dana? She is going to get married with Graham! Scott: ______

单选题Oil is an important ______ material which can be processed into many different products including plastics. A. raw B. bleak C. flexible D. fertile

单选题______ in a recent science competition, the three students were awarded scholarships totaling $ 21000. A. Judged the best B. To be judged the best C. Judging the best D. Having judged the best

单选题Most forest fires are caused by human carelessness, negligence, or ignorance. Forest fire prevention, therefore, is mainly a problem of creating a better understanding of the importance of forests, an awareness of the danger of fire in the woods, and a sense of personal responsibility to safeguard the forests from danger. This is not an easy job. A city dweller, used to paved streets, does not easily change his smoking habits when he goes into the woods. Careless smokers are responsible for thousands of forest fires each year. Many of these are started when cigarette butts and matches are thrown from automobiles. Others are caused by hunters, hikers, fishermen, or woods workers who are careless in disposing of their smoking materials. The Forest Service has posted rules in many of the National Forests that prohibit smoking except in certain designated areas. Many of the states have laws against throwing lighted materials from automobiles. The prevention of smoker-caused fires, however, depends upon changing the attitudes and behavior of millions of people who smoke in hazardous areas. The most important natural cause of fire is lightning. This accounts for 11 percent of forest fires on protected land for the entire nation; in the western States, lightning causes a much higher percentage of fires than it does in the East. Advances in knowledge of fire weather are helping forest protection forces to know when to be alert for lightning-caused fires. Adequate and well-equipped forces can control them quickly and hold the damage to a minimum. Experiments in "seeding" thunder clouds to prevent or control the lightning itself have been in process for many years, but new breakthroughs are needed for any significant reduction in the lightning-caused fires.

单选题______ is generally accepted, economical growth is determined by the smooth development of production. A. What B. That C. It D. As

单选题If you ______ in such a hurry you ______ sugar into the sauce instead of salt. A. were not, would not put B. were, would put C. had been, would have put D. had not been, would not have put

单选题They purchased a car last week.

单选题 Educational attitudes in a country may be a{{U}} (31) {{/U}}by which its basic cultural values are reflected. To take the American higher education{{U}} (32) {{/U}}example, university classrooms share certain identical features though they{{U}} (33) {{/U}}from course to course in some aspects. Any student,{{U}} (34) {{/U}}their ethnic and social background, is not only allowed but also encouraged to have chances for active participation in class.{{U}} (35) {{/U}}, teachers often expect independent learning{{U}} (36) {{/U}}their students. It will be most appreciated if a student can{{U}} (37) {{/U}}the initiative and complete the assignment without too much{{U}} (38) {{/U}}upon his or her instructors. These two{{U}} (39) {{/U}}features in American university classrooms actually manifest the basic American values, especially self-reliance and{{U}} (40) {{/U}}of opportunity.

单选题The population will be increasing very fast unless they ______ with new methods to deal with it.

单选题Man: How long does the journey take if I go by bus? Woman: ______. I think the Airport Express is your best bet. Man: Many thanks. A. I don't know yet B. It depends on the traffic C. Let me see D. You'll consider the distance

单选题Johnson: I got home very late last night. I hope I didn't disturb you. Landlady: ______. A. No, I heard a lot of noise. B. No, I didn't hear a thing. C. Yes, I didn't hear any noise. D. Yes, I didn't hear you.

单选题Because his health is getting worse, he has to ______ himself from drinking to excess.

单选题With temperature ______ so rapidly, we could not go on with the experiment. A. fell B. fall C. falling D. fallen

单选题Surprisingly, he preferred to stay at home ______ with us.

单选题How often one hears children wishing they were grown up, and old people wishing they were young again. Each age has its pleasures and its pains, and the happiest person is the one who enjoys what each age gives him without wasting his time in useless regrets. Childhood is a time when there are few responsibilities to make life difficult. If a child has good parents, he is fed, looked after and loved, whatever he may do. It is impossible that he will ever again in his life be given so much without having to do anything in return. In addition, life is always presenting new things to the child--things that have lost their interest for older people because they are too well known. But a child has his pains; he is not so free to do what he wishes to do; he is continually being told not to do things, or being punished for what he has done wrong. When the young man starts to earn his own living, he can no longer expect others to pay for his food, his clothes, and his room, but has to work if he wants to live comfortably. If he spends most of his time playing about in the way that he used to as a child, he will go hungry. And if he breaks the laws of society as he used to break the laws of his parents, he may go to prison. If, therefore, he works hard, keeps out of trouble and has good health, he can have the great happiness of building up for himself his own position in society.