单选题It is a very important game, and it is advisable to ______ seats well in advance.

单选题Questions 11-15 are based on the following passage: Although no one is certain why migration occurs, there are several theories. One theory claims that prehistoric birds of the Northern Hemisphere were forced south during the Ice Age. As the glaciers melted, the birds came back to their homelands, spent the summer, and then went south again as the ice advanced in winter. In time, the migration became a habit in spite of the disappearance of glaciers. Another theory proposes that the ancestral home of all modern birds was the tropics. When the region became overpopulated, many species were crowded north. During the summer, there was plenty of food, but during the winter, scarcity forced them to return to the tropics. A more recent theory suggests a relationship between increasing daylight and the stimulation of certain glands (腺) in the birds' bodies that may prepare them for migration. One scientist has been able to cause midwinter migrations by exposing birds to artificial periods of daylight. He has concluded that changes occur in the bodies of birds due to seasonal changes in the length of daylight.

单选题The author states that birds left the tropics because ______.

单选题If ______ and lodging are included in educational fees, a university student in the U.S. will need approximately $10,000 a year. A. meal B. board C. food D. provisions

单选题It can be inferred from the passage that by 1870 ______.

单选题When does the typing service close on Wednesday?

单选题(Some) methods (to prevent) soil erosion(侵蚀) ) (are) plowing parallel with the slopes of hills, (to plant) trees on unproductive land, and rotating crops.

单选题In the late 1960's, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely criticized. Ecologists pointing (21) that a cluster of tall buildings in a city often overburdens public transportation and parking lot (22) . Skyscrapers are also enormous (23) , and wasters, of electric power. In one recent year, the addition (24) 17 million square feet of skyscraper office space in New York City raised the (25) daily demand for electricity by 120,000 kilowatts-- enough to (26) the entire city of Albany for a day. Glass-wailed skyscraper can be especially (27) . The heat loss (or gain) through a wall of half-inch plate glass is more than ten times (28) through a typical masonry wall filled with insulation board. To lessen the strain (29) heating and air-conditioning equipment, (30) of skyscrapers have begun to use double-glazed panels of glass, and reflective glasses (31) with silver or gold mirror films that reduce (32) as well as heat gain. However, (33) skyscrapers raise the temperature of the surrounding air and (34) neighboring buildings. Skyscrapers put severe pressure on a city's sanitation (35) , too. If fully occupied, the two World Trade Center towers in New York City would alone generate 2.25 million gallons of raw sewage each year--as (36) as a city the size of Stamford, Connecticut, which has a (37) of more than 109,000. Skyscrapers also (38) with television reception, block bird flyways, and obstruct air traffic. Still, people (39) to build skyscrapers for all the reasons that they have always built them--personal ambition and the (40) of owners to have the largest possible amount of rentable space.

单选题Questions 26-30 are based on the following passage: 　　　　　　　　　　　　　　　　　　Help Wanted Ad Outstanding opportunity with local real estate corporation. Requires strong background in real estate, financing. Some legal training helpful. Prefer candidate with M. A. and two or more years of successful real estate experience. Broker's license required. Salary range $ 50,000-$ 80,000 yearly in accordance with education and experience. Begin immediately. Interviews will be conducted Tuesday and Thursday, June 10 and 12. Call for an appointment 243-11522,or send a letter of application and resume to:Personnel Department　　Executive Real Estate Corporation　　500 Capital Avenue　　Lawrence, Kansas 67884

单选题Humans are unique in the extent to which they can reflect on themselves and others. Humans are able to (1) , to think in abstract terms, to reflect on the future. A meaningless, (2) world is an insecure world. We do not like extensive insecurity. When it (3) to human behavior we infer meaning and (4) to make the behavior understandable. (5) all this means is that people develop "quasi theories" of human behavior, that is, theories that are not developed in a(an) (6) , scientific manner. When doing so, people believe they know (7) humans do the things they do. Let's consider an example. In the United States people have been (8) with the increasing amount of crime for several years. The extent of crime bothers us; we ourselves could be victims. But it (9) bothers us that people behave in such ways. Why can such things happen? We develop quasi theories. We (10) concerned about the high crime rate, but we now believe we (11) it: our criminal justice system is (12) ; people have grown selfish and inconsiderate as our moral values weaken (13) the influence of liberal ideas; too many people are (14) drugs. These explanations suggest possible solutions. (15) the courts; put more people in jail as examples to other lawbreaker. There is now hope that the problem of crime can be solved if only we (16) these solutions. Again, the world is no longer meaningless nor (17) so threatening. These quasi theories (18) serve a very important function for us. But how accurate are they? How (19) will the suggested solutions be? These questions must be answered with (20) to how people normally go about developing or attaining their quasi theories of human behavior.

单选题He was offered the presidency of that country but he declined it, saying that he didn't have good health.

单选题Speaker A: Did you have a good crossing?Speaker B: ______. It was really rough and I'm not a good sailor.

单选题There is Uwidespread/U speculation that he is going to resign.

单选题Let's stop to take up another subject, ______ we? A. oughtn't B. don't C. shall D. should

单选题Under no_______ are children allowed to tell lies to their parents.

单选题 Lazy? Shy? Live in a cave? Those might not be positive attributes for the average human, but they sure are good for animals trying to survive in a changing environment. According to a new study, beasts that hibernate(冬眠)or crawl into holes are less likely to be listed as endangered than those that don't. Following up a previous study on extinct animals, which showed that species exhibiting "sleep or hide" (SLOH)behaviors did better than others, the researchers wanted to see if the same was true of modern crearures like moles and bears. To find out if our more timid animals have a leg up in the survival game, researchers made a master list of 443 sleep-or-hide mammals. With their list in hand, the team compared their 443 to the "red list" of endangered species published by the International Union for Conservation of Nature. As suspected, a sleepy of hiding animal was less likely to be on the red list than a regular animal, and a red-list animal was also less likely to be a SLOH-er. This makes a lot of sense, as animals that hide away in a cave or a tree hole are protected by their physical shelters from a variable environment outside, while hibernators enjoy a flexible metabolism(新陈代谢)that can help them adapt to a changing climate.

单选题Ann never dreams of ______ for her to be sent abroad very soon.

单选题Speaker A:Could you break a 100-dollar bill for me? Speeaker B:______

单选题(The more straighter) the sun's rays shine down (upon) the earth, (the more heat) they give to the part of the earth (they touch).A. The more straighterB. uponC. the more heatD. they touch

单选题Passage 1 The evolution of the social sciences has reached a crucial point that might be called a phase change in which old, atomistic, and impressionistic ways of doing research are superseded by a far more systematic and united methodology. To bring social sciences to the level of rigor already achieved by some of the physical sciences, a new type of facility will be needed. This will be a trans-disciplinary, Internet-based collaboratory that will provide social and behavioral scientists with the databases, software and hardware tools, and other resources to conduct worldwide research that integrates experimental, survey, geographic, and economic methodologies on a much larger scale than was possible previously. This facility will enable advanced research and professional education in economics, sociology, political science, social geography, and related fields. In many branches of social sciences, a new emphasis on the rigor of formal laboratory experimentation has driven researchers to develop procedure and software to conduct online interaction experiment using computer terminals attached to local area networks. The opportunity to open these laboratories to the Internet will reduce the cost per research participant and increase greatly the number of institutions, researchers, students, and research participants who can take part. The scale of social sciences experimentation can increase by an order of magnitude or more, examining a much wider range of phenomena and ensuring great confidence in results through multiple replication of crucial studies. Technology for administering questionnaires to very large numbers of respondents over the Internet will revolutionize survey research. Data from past questionnaire surveys can be the springboard for new surveys with vastly larger numbers of respondents at lower cost than by traditional methods. Integrated researches can combine modules using both questionnaire and experimental methods.Results can be linked via geographic analysis to other sources of data including census information, economic statistics, and data from other experiments and surveys. Longitudinal studies will conduct time-series comparisons across data sets to chart social and economic trends. Each new study will be designed so that the data automatically and instantly becomes part of the archives, and scientific publications will be linked to the data sets on which they are based so that the network becomes a universal knowledge system.