单选题______ at the outset, ______ instead of shifting thing about may be pheromones released when they reach committee size. A. The stimuli set them off ... build collectively B. The stimuli that set them off ... building collectively C. The stimuli setting them off ... they build collectively D. Being set off by stimuli ... their building collectively

单选题Just as the value of a telephone network increases with each new phone ______ to the system, so does the value of a computer system increase with each program turned out. A. adding B. to have added C. to add D. added

单选题{{B}}Directions:{{/B}} Read the following passage. For each numbered blank there are four choices marked A. B, C and D. Choose the best one and mark your answers on ANSWER SHEET 1. 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 {{U}}(21) {{/U}} that a cluster of tall buildings in a city often overburdens public transportation and parking lot{{U}} (22) {{/U}}. Skyscrapers are also enormous {{U}}(23) {{/U}}, and wasters, of electric power. In one recent year, the addition {{U}}(24) {{/U}}17 million square feet of skyscraper office space in New York City raised the {{U}}(25) {{/U}} daily demand for electricity by 120,000 kilowatts-- enough to {{U}}(26) {{/U}} the entire city of Albany for a day. Glass-wailed skyscraper can be especially {{U}}(27) {{/U}}. The heat loss (or gain) through a wall of half-inch plate glass is more than ten times{{U}} (28) {{/U}} through a typical masonry wall filled with insulation board. To lessen the strain {{U}}(29) {{/U}} heating and air-conditioning equipment, {{U}}(30) {{/U}} of skyscrapers have begun to use double-glazed panels of glass, and reflective glasses {{U}}(31) {{/U}} with silver or gold mirror films that reduce {{U}}(32) {{/U}} as well as heat gain. However, {{U}}(33) {{/U}} skyscrapers raise the temperature of the surrounding air and {{U}}(34) {{/U}} neighboring buildings. Skyscrapers put severe pressure on a city's sanitation {{U}}(35) {{/U}}, 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 {{U}}(36) {{/U}} as a city the size of Stamford, Connecticut, which has a {{U}}(37) {{/U}} of more than 109,000. Skyscrapers also {{U}}(38) {{/U}} with television reception, block bird flyways, and obstruct air traffic. Still, people {{U}}(39) {{/U}} to build skyscrapers for all the reasons that they have always built them--personal ambition and the {{U}}(40) {{/U}} of owners to have the largest possible amount of rentable space.

单选题Ann：Good morning，Peter．How are you? Peter：______ Ann：Very well，thank you． A．Just fine，Ann，and you? B．It’s very nice of you． C．See you later．D．I am so glad to meet you．

单选题Although punctual himself, the professor was quite used ______ late for his lecture. A. to have students B. for students' being C. for students to be D. to students' being

单选题 The next decade could see commuters speeding to work at about 300 miles per hour aboard magnetic levitation vehicles, according to a report by Argonne National Laboratories. But before "maglev" vehicles can become commercial successes, the report says, people need to stop thinking of them as high-speed trains. Instead, consider them low-flying aircraft. Argonne contends that maglev vehicles will be best suited to replace commuter aircraft. Plane flights under 600 miles are the least energy-efficient, and maglev "planes" should cut these fuel needs by up to 75 percent. Reportedly, the money saved by a 2,000- mile maglev network linking major cities world more than pay for its construction in 20 years. The quiet purr of levitating crafts would also be a balm for neighborhoods tormented by the roar of conventional takeoffs and landings. The technology behind magnetic levitation is already well understood, the report notes. The west Germans and the Japanese already well understood, the report notes. The West Germans and the Japanese have several full-scale working models. Meanwhile, research in the United States has lapsed.

单选题Student: ______.Librarian: Sure, it' s open from 9:00 a.m. to 6:00 p.m. Monday through Thursday, 9:00 a.m. to noon on Friday and closed on Saturday and Sunday.

单选题Wood carving refers to the art of creating or decorating objects of wood by carving with a sharp, hand-held tool. This form of art has a history of over 1,000 years and a unique artistic style. The following is some introduction about wood carving in America. Wood carving began as a necessity in America and developed into an art. Because of the lack of other materials, early settlers were forced to make tools and utensils out of wood. At first, these articles were whittled with a knife, but when pioneer craftsmen set up their primitive shops most of them were fashioned on a lathe--a machine which holds an object and rotates it while it is being shaped by a tool. However, even after Massachusetts-born Thomas Blancard designed a lathe which could turn irregular shapes--an innovation that made possible mass production of gunstocks, shoe lasts, oblong and square wooden wares--craftsmen who could use knife and chisel skillfully were still in demand. Some found ready employment in shops of cabinetmakers, while others, carved decoy. Still others specialized in creating shop signs, ship figureheads, or in decorating interior woodwork. A few even accepted commissions to make busts of prominent citizens.

单选题From now on I want you to keep me ______ of how things are going on with you.

单选题I intended ______ the subject with you, but I was too busy then. A. having discussed B. to discuss C. to have discussed D. discussing

单选题The development of (new building materials) and mass-production techniques (brought) significant changes (to architecture) in the first quarter of (the twentieth century).

单选题A: My car doesn't work. Can you repare it? B: Of course, ______

单选题中国第一部电视剧作品是( )。

单选题For an increasing number of students at American universities, Old is suddenly in. The reason is obvious; the graying of America means jobs, coupled with the aging of the baby-boom (生育高峰) generation, a longer life span means that the nation"s elderly population is bound to expand significantly over the next 50 years. By 2050, 25 percent of all Americans will be older than 65, up from 14 percent in 1995. The change poses profound questions for government and society, of course. But it also creates career opportunities in medicine and health professions, and in law and business as well. "In addition to the doctors, we"re going to need more sociologists, biologists, urban planners and specialized lawyers," says Professor Edward Schneider of the University of Southern California"s (USC) School of Gerontology (老年学). Lawyers can specialize in "elder law", which covers everything from trusts and estates to nursing-home abuse and age discrimination (歧视). Businessmen see huge opportunities in the elder market because the baby boomers, 74 million strong, are likely to be the wealthiest group of retirees in human history. "Any student who combines an expert knowledge in gerontology with, say, an MBA or law degree will have a license to print money. " one professor says. Margarite Santos is a 21-year-old senior at USC. She began college as a biology major but found she was "really bored with bacteria". So she took a class in gerontology and discovered that she liked it. She says, "I did volunteer work in retirement homes and it was very satisfying. " (266 words)

单选题If at some point they do import Christianity, it is ______ that it will be absorbed and adapted ______ strengthen the continuing core of Chinese culture. A. more than likely.., in such a manner as to B. more likely than ... in such a manner so as to C. likely more than ... in a manner so as to D. more likely ... to such a manner as

单选题Einstein, like other great physicists before him, worked out new theories that challenge our ______ concept of the universe.

单选题She got a ______ job while she was waiting to go to the university.

单选题The competition among producers of personal computers is essentially a race to get the best, most innovative products to the marketplace. Marketers in this environment frequently have to make a judgement as to their competitors' role when making marketing strategy decisions. If major competitors are changing their products, then a marketer may want to follow suit to remain competitive. Apple Computer, Inc. has introduced two new, faster personal computers, the Mackintosh II and Mackintosh SE, in anticipation of the introduction of a new PC by IBM, one of Apple's major competitors. Apple's new computers are much faster and more powerful than its earlier models. The improved Mackintosh is able to run programs that previously were impossible to run on an Apple PC, including IBM-compatible (兼容的) programs. This compatibility feature illustrates computer manufacturers' new attitude of giving customers the features they want. Making Apple computers capable of running IBM computers and thus more popular in the office, where Apple hopes to increase sales. Users of the new Apple can. also add accessories (附件) to make their machines specialize in specific uses, such as engineering and writing. The new computers represent a big improvement over past models, but they also cost much more. Company officials do not think the higher price will slow down buyers who want to step up to a more powerful computer. Apple wants to stay in the high-price end of the personal computer market to finance research for even faster, more sophisticated computers. Even though Apple and IBM are major competitors, both companies realize that their competitor's computers have certain features that their own models do not. The Apple line has always been popular for its sophisticated color graphics (图形) , whereas the IBM machines have always been favored in offices. In the future, there will probably be more compatibility between the two companies' products, which no doubt will require that both Apple and IBM change marketing strategies.

单选题More thunderstorms ______ in summer than any other time of the year. A. happened B. have happened C. happen D. will happen

单选题Charles: What time are you leaving?Brown: I'm going to try to leave by 10:00.Charles: Take care and ______.Brown: Goodbye. Hope to see you again next year.