单选题This selection leads one to believe that the Earth ______.

单选题________into oceans and rivers is a serious form of pollution.

单选题The professor is quite difficult {{U}}pleased{{/U}}.

单选题Some of the low-end made-in-China mechanical-electronic products are not selling well in export market as compared with what are termed as high-end ones.

单选题Readers are required to abide by the rules of the library and mind their manners.

单选题One {{U}}who{{/U}} desires and impulses are not his own has no character.

单选题Mathematics as well as physics always______me a lot of trouble.

单选题Some people associate migration mainly with birds. Birds do travel vast distances, but mammals also migrate. An example is the caribou, reindeer that graze on the grassy slopes of northern Canada. When the weather turns cold, they travel south until spring. Their tracks are so well-worn that they are clearly visible from the air. Another migrating mammal is the Alaska fur seal. These seals breed only in the Pribilot Islands in the Bering Sea. The young are born in June and by September are strong enough to go with their mothers on a journey of over 3,000 miles. Together they swim down the Pacific Coast of North America. The females and young travel as far as southern California. The males do not journey so far. They swim only to the Gulf of Alaska. In the spring, males and females all return to the islands, and there the cycle begins again. Whales are among the greatest migrators of all. The humpback and blue whales migrate thousands of miles each year from the polar seas to the tropics. Whales eat huge quantities of plankton. These are most abundant in cold polar waters. In winter, the whales move to warm waters to breed and give birth to their young.

单选题The fact that most Americans live in urban areas does not mean that they reside in the center of large cities. In fact, more Americans live in the suburbs of large metropolitan areas than in the cities themselves. The Bureau of the Census regards any area with more than 2,500 people as an urban area, and does not consider boundaries of cities and suburbs. According to the Bureau, the political boundaries are less significant than the social and economic relationships and the transportation and communication systems that integrate a locale. The term used by the Bureau for an integrated metropolis is an MSA, which stands for Metropolitan Statistical Area. In general, an MSA is any area that contains a city and its surrounding suburbs and has a total population of 50,000 or more. At the present time, the Bureau reports more than 280 MSAs, which together account for 75 percent of the U.S. population. In addition, the Bureau recognizes 18 megapolises, that is, continuous adjacent metropolitan areas. One of the most obvious megapolises includes a chain of hundreds of cities and suburbs across 10 states on the East Coast from Massachusetts to Virginia, including Boston, New York, and Washington D. C. In the Eastern Corridor, as it is called, a population of 45 million inhabitants is concentrated. Another megapolis that is growing rapidly is the California coast from San Francisco through Los Angeles to San Diego.

单选题The early railroads were connected short lines in the existing arteries of transportation: roads, turnpikes, canals, and other waterways. A. short lines that connected B. those short fines connected C. connected by short lines D. short connected lines

单选题That touching toads causes warts {{U}}are{{/U}} still one of the most widely believed superstitions in America.

单选题Computer programmer David Jones earns ￡35,000 a year designing new computer games, yet he cannot find a bank prepared to let him have a check card. Instead, he has been told to wait another two years, until he is 18. The 16-year-old works for a small firm in Liverpool, where the problem of most young people of his age is finding a job. David's firm releases two new games for the expanding home computer market each month. But David's biggest headache is what to do with his money. Despite his salary, earned by inventing new programs within fight schedules, with bonus payments and profit-sharing, he cannot drive a car, take out a mortgage, or obtain credit cards. He lives with his parents in their council house in Liverpool, where his father is a bus driver. His company has to pay ￡150 a month in taxi fares to get him the five miles to work and back every day because David cannot drive. David got his job with the Liverpool-based company four months ago, a year after leaving school with six O-levels and working for a time in a computer shop. "I got the job because the people who run the firm knew I had already written some programs," he said. "I suppose ￡35,000 sounds a lot but actually that's being pessimistic. I hope it will come to more than that this year." He spends some of his money on records and clothes, and gives his mother ￡20 a week. But most of his spare time is spent working. "Unfortunately, computing was not part of our studies at school," he said. "But I had been studying it in books and magazines for four years in my spare time. I knew what I wanted to do and never considered staying on at school. Most people in this business are fairly young, anyway." David added, "I would like to earn a million and I suppose early retirement is a possibility. You never know when the market might disappear./

单选题The advertising industry in today's world does have its share of responsibilities in leading people to misconceptions. A. for leading people to B. to lead people to C. to lead people into D. for leading people into

单选题The article gives us a summary of the situation in the first part and then discusses it ______.

单选题We got down to business as soon as we______each other.

单选题He finished the work______the cost of his health.

单选题All the recent news on AIDS is bad. The death of Rock Hudson 21 public concern about the 22 almost to the point of panic. Now general concern is 23 not so much on personal risk but on the growing realization 24 this disease is having a deep impact 25 our society in a number of ways. For one thing, it is 26 financial and other resources. AIDS patients require long-term care in hospitals and out patient 27 . The Center for Disease Control in Atlanta estimates that hospital 28 for the first 10,000 AIDS patients were about $1.4 billion. The total economic cost to the nation of AIDS cases is estimated to 29 to $6 billion in health care, disability, and lost 30 . Private insurers were unprepared for the crisis 31 the invariably fatal disease hits primarily young people. It is becoming increasingly 32 for those in high risk groups to get health and life assurance, and in the 33 of private coverage, public funds must be used 34 , many of the victims are 35 by disapproving or frightened friends and family, without employment, and 36 need of emotional and psychological support. There is also bad news on the medical 37 . In spite of a stepped-up research program there is no sign of an 38 breakthrough to a cure. Yet the physicians and others continue to work and to hope. Others not directly 39 can help by giving support to public funding for research, hospital and support services. A public 40 to provide care now and an eventual cure for those who suffer is the best response.

单选题He cannot see anything without his glasses, so he made a ______ of remembering to get them fixed before he went to work.

单选题When Henry arrived home after a hard day at work, his wife was slept .

单选题When it comes to looking at things, fat people and thin people never come to terms with each other because