单选题The growth of population during the past few centuries is no proof that population will continue to grow straight upward toward infinity and doom. On the contrary, demographic history offers evidence that population growth has not been at all constant. According to paleo-ecologist Edward Deevey, the past million years show three momentous changes. The first, a rapid increase in population around one million B. C., followed the innovations of tool-making and tool-using. But when the new power from the use of tools had been exploited, the rate of world population growth fell and became almost stable. The next rapid jump in population started perhaps 10,000 years ago, when men began to keep herds, plow and plant the earth. Once again when initial productivity gains had been absorbed, the rate of population growth abated. These two episodes suggest that the third great change, the present rapid growth, which began in the West between 250 and 350 years ago, may also slow down when, or if technology begins to yield fewer innovations. Of course, the current knowledge revolution may continue without foreseeable end. Either way contrary to popular belief in constant geometric growth--population can be expected in the long nm to adjust to productivity.

单选题Ken: Gee, Martin, I'd love a cup of coffee. Martin: ______, Is instant OK? A. Sure thing B. I'm sure C. No kidding D. Sure I do

单选题There are ______ the three-year-old child can count.

单选题The shirt is a real bargain because it is good in quality and______in price.

单选题______ for your advice, I would have been taken in. A. Had it not B. Had it not been C. If it had not D. Weren't it

单选题Scientists can predict regions ______ new species are most likely to be found.

单选题 A good modern newspaper is an extraordinary piece of reading. It is remarkable first for what it contains: the range of news from local crime to international politics, from sport to business to fashion to science, and the range of comment and special features (特定) as well, from editorial page to feature articles and interviews to criticism of books, art, theatre and music. A newspaper is even more remarkable for the way one reads it: never completely, never straight through, but always by jumping from here to there, in and out, glancing at one piece, reading another article all the way through, reading just a few paragraphs of the next. A good modern newspaper offers a variety to attract many different readers, but far more than any one reader is interesied in. What brings this variety together in one place is its topicality (时事性), its immediate relation to what is happening in your world and your locality now. But immediacy and the speed of production that goes with it mean also that much of what appears in a newspaper has no more than transient (短暂的) value. For all these reasons, no two people really read the same paper: what each person does is to put together out of the pages of that day's paper, his own selection and sequence, his own newspaper. For all these reasons, reading newspapers efficiently, which means getting what you want from them without missing things you need but without wasting time, demands skill and self-awareness as you modify and apply the techniques of reading.

单选题Thousands of gypsies have been trying to emigrate to Canada and Britain. They say they are fleeing persecution(迫害), but most have found they are not welcome in these countries either. Gypsies have never had a home. Europe has experienced enormous upheavals this century. Wars, revolutions, separations and elections have changed the political map of the continent countless times. And with each change, power has shifted, creating new winners and new losers. But for one group -- the gypsies -- change has always meant losing. With each upheaval, the gypsies have been left worse off than they were before. Yet they have survived to become Europe's largest minority. Moreover, they have succeeded in preserving their culture and their way of life in the face of genocide (种族灭绝), political persecution and poverty. In other cases where minorities have survived similar persecutions -- like Jews during World War Ⅱ, or blacks in South Africa -- their cause has received international support. By contrast, the gypsies' success at preserving their culture is not regarded as an achievement at all. Instead, it' s viewed as proof they are both unwilling and unable to change, and therefore irredeemable (不可救药的). Indeed, in 1993, the president of the Slovak Republic attacked their way of life and said steps should be taken to limit the extension of this socially unacceptable and mentally backward population. If such a thing had been said about any other minority, the political protest would have been enormous But, bemuse the Slovak President was referring to gypsies, there were few complaints, except from a few small organizations who try to protect gypsies' rights.

单选题{{B}}21-25{{/B}} Promptness is important in American business, academic, and social settings. The importance of punctuality is taught to young children in school. Tardy slips and the use of bells signal to the child that punctuality and time itself are to be respected. People who keep appointments are considered dependable. If people are late to job interviews, appointments, or classes, they are often viewed as unreliable and irresponsible. In the business world, "time is money" and companies may fine their executives for tardiness to business meetings. Of course, it is not always possible to be punctual. Social and business etiquette also provides rules for late arrivals. Calling on the telephone if one is going to be more than a few minutes late for scheduled appointments is considered polite and is often expected. Keeping a date of a friend waiting beyond ten to twenty minutes is considered rude. On the other hand, arriving thirty minutes late to some parties is acceptable.

单选题I advised her that in the presence of the princess she should not say anything until ______. A. asked B. being asked C. having been asked D. to be asked

单选题Salesgirl: Good morning, miss. Can I help you?Mary: Yes, I'd like half a kilo oranges, please.Salesgirl: ______. Anything else?Mary: No, thank you.

单选题 Hunting for a job late last year, lawyer Gant Redmon stumbled across CareerBuilder, a job database on the Internet. He searched it with no success but was attracted by the site's "personal search agent". It's an interactive feature that lets visitors key in job criteria such as location, title, and salary, then E-mails them when a matching position is posted in the database. Redmon chose the keywords legal, intellectual property, and Washington, D. C. Three weeks later, he got his first notification of an opening. " I struck gold," says Redmon, who E-mailed his resume to the employer and won a position as in-house counsel for a company. With thousands of career-related sites on the Internet, finding promising openings can be time-consuming and inefficient. Search agents reduce the need for repeated visits to the databases. But although a search agent worked for Redmon, career experts see drawbacks. Narrowing your criteria, for example, may work against you: "Every time you answer a question you eliminate a possibility. " says one expert. For any job search, you should start with a narrow concept—what you think you want to do—then broaden it. " None of these programs do that," says another expert. " There's no career counseling implicit in all of this. " Instead, the best strategy is to use the agent as a kind of tip service to keep abreast of jobs in a particular database; when you get E-mail, consider it a reminder to check the database again. " I would not rely on agents for finding everything that is added to a database that might interest me," says the author of a job-searching guide. Some sites design their agents to tempt job hunters to return. When Career Site's agent sends out messages to those who have signed up for its service, for example, it includes only three potential jobs—those it considers the best matches. There may be more matches in the database; job hunters will have to visit the site again to find them—and they do. "On the day after we send our messages, we see a sharp increase in our traffic," says Seth Peets, vice president of marketing for Career Site. Even those who aren't hunting for jobs may find search agents worthwhile. Some use them to keep a close watch on the demand for their line of work or gather information on compensation to arm themselves when negotiating for a raise. Although happily employed, Redmon maintains his agent at Career Builder. "You always keep your eyes open," he says. Working with a personal search agent means having another set of eyes looking out for you.

单选题Girl: Are you ready to order? Man: ______ Girl: Sure. I"ll he back in a moment.

单选题______ it left to me to decide, I would never hesitate to choose the former.

单选题Applicant will be asked to provide information on how they will ______information to other students at their university or college.

单选题The play was a great success, and it was all Uthanks to/U the effort and commitment(所承担的义务 ) of everyone involved.

单选题I'd rather ______ care of the stomaches of the living than the glory of the dead in the form of stone memorials.

单选题 Psychologist George Spilich and colleagues at Washington College in Chestertown, Mary-land, decided to find out whether, as many smokers say, smoking helps them to "think andconcentrate." Spilich put young non-smokers, active smokers and smokers deprived (被剥夺)of cigarettes through a series of tests. In the first test, each subject (试验对象) sat before a computer screen and pressed a keyas soon as he or she recognized a target letter among a grouping of 96. In this simple test, smok-ere, deprived smokers and nonsmokers performed equally well. The next test was more complex, requiring all to scan sequences of 20 identical letters andrespond the instant one of the letters transformed into a different one. Non-smokers were faster,but under the stimulation of nicotine (尼古丁) , active smokers were faster than deprived smok-ere. In the third test of short-term memory, non-smokers made the fewest errors, bul deprivedsmokers committed fewer errors than active smokers. The fourth test required people to read a passage, then answer questions about it.Non-smokers remembered 19 percent more of the most important information than active smokers,and deprived smokers bested those who had smoked a cigarette just before testing. Active smokerstended not only to have poorer memories but also had trouble separating important information frominsignificant details. "As our tests became more complex," sums up Spilich, "non-smokers performed better thansmokers by wider and wider margins." He predicts, "smokers might perform adequately at manyjobs until they got complicated. A smoking airline pilot could fly adequately if no problems arose,but if something went wrong, smoking might damage his mental capacity."

单选题For most kinds of activities, a large group of people can accomplish more and have more fun than one person alone. For example, politicians, businessmen, workers, and (31) criminals know that they must join organizations in order to be (32) . Since there is usually strength in numbers, labor unions have a more (33) influence on wages and company policy than individual workers (34) . A person may also belong to social clubs and athletic teams (35) he or she can meet other people who are interested in the same activities. (36) you have a hobby, such as playing chess, collecting coins or stamps, or playing a musical instrument, you should join a club which has (37) meetings to talk about your activity; the other (38) will help you learn more about it. Of course, a group must be well (39) , or k might be a failure. All the members should work together on projects and choose good leaders to. (40) their activities. In this way, the organization will benefit everyone in it.