单选题What docs the word "precursor" in the context in Para. 3 mean?

单选题From this passage we know that workaholic is a term referring to those

单选题The duty of the American Council on graduate medical education is to

单选题The achievements from Human Genome Project enable researchers to ______.

单选题{{I}} Questions 14～16 are based on the following dialogue. You now have 15 seconds to read questions 14～16.{{/I}}

单选题 Questions 14～16 are based on a dialogue between a part-time student and a school registrar. You now have 15 seconds to read Questions 14～16.

单选题According to the author, how can the addicts get the money for drugs?

单选题{{I}} Questions 11～13 are based on the following passage. You now have 15 seconds to read questions 11～13.{{/I}}

单选题 The demoralizing environment, decrepit (老朽的) building and minimal materials make the high school experience for these children an Uphill battle. Merely graduating from such a high school is difficult, much less becoming a high-caliber science or engineering student. Schools with students from a higher socioeconomic level would not tolerate the obstacles I encountered daily. Improvements need to be made efficiently and made soon, or the divisions among people in this country will only become more extreme. Of course, there are things that concerned citizens can do to help. Get involved with a school, especially one in a poor area. Volunteer to give a presentation or just to spend time with the children. My students were excited to talk to an insurance salesperson who came to give a career exploration lecture. They not only were genuinely interested in the opportunities he described but also were amazed that such a man would donate an afternoon to them. Although those measures can help, they are not enough. For teaching to be effective, the entire environment of the inner city needs to be changed. Teaching someone the difference between velocity and acceleration is irrelevant if the person is hungry and scared. Programs that educate parents in child-rearing, organize low-income groups into cooperative units, fight drug trafficking and help to clean up the ghettos physically will improve the life in the community. The small alterations and "new" proposals currently filling the newspapers are certainly not strong enough to transform a decaying and demoralized school structure that has been disintegrating for decades. Inner-city schools need so much more, and the children deserve so much more than our society is willing to give. Like many other people, I entered the teaching profession eager to investigate change and found many institutionalized obstacles in my way. It should not be so difficult to make a difference.

单选题Electricity plays an essential part in our life. No one can deny that electric light is necessary for people's life. However, can you imagine such a world where there is no (22) of electric light? As darkness falls over, children read in the light given by oil lamps and candles. Youths (23) time only by talking instead of watching TV. Everything is surrounded by (24) shadows. (25) , we have a man named Edison. He created bulb that (26) for two days before burning out. He also developed successfully a system for (27) electricity from a central powerhouse. It is he that gives us electric light, gramophone, moving pictures--all those we take (28) granted. After the invention of electricity, manufacturers increasingly applied the findings of invention to their businesses, (29) generating new industrial growth. Development of electricity leads to the (30) creations of new products and materials. In the past century and a half, electricity has steadily (31) . At first, it is scientific curiosity, then to a luxurious part of the (32) , and then to being necessary in every one's life. Electricity has been common in the latest fifty years. Simple tasks, such as setting alarm clock to wake up at a (33) time or enjoying a piece of music, are accomplished via electronic means. We live with the benefits of electricity every day. As a result, we always think that whenever we (34) our gadgets into the wall socket, the power will be there. For most modern people, the loss of power means the complete loss of (35) . Their lifestyle is so dependent upon the grid's constancy (36) they do not know how to live without it. How do you cook a meal without electricity if your gas stove has an electric ignition? Please imagine the life without electricity further. What do you do with a freezer full of food in a hot day? How do you find out what is happening in your area with the TV and radio off? These are questions which should be seriously considered. Let us imagine the (37) of a short power outage together. Factories close down; phones and computers go dead; food (38) in refrigerators. What a disordered life that would be! All the convenience which electricity has brought to our life should owe to Edison. When Edison died at his home in New Jersey in 1931, the whole United States were switched off to mark his passing, and in (39) of the man whose discoveries had so changed and improved the life of people everywhere. For a moment, all was (40) -- as the world had always been before, until Edison (41) on the light.

单选题{{B}}Part A{{/B}} Reading the following four texts. Answer the questions below each text by choosing A, B, C or D. Mark your answers on ANSWER SHEET 1.{{B}}Text 1{{/B}} Security and commodity exchanges are trading posts where people meet who wish to buy or sell. The exchanges themselves do no trading; they merely provide a place where prospective buyers and sellers can meet and conduct their business. Wall Street, although the best known, is not the only home of exchanges in the United States. There are the cotton exchanges in New Orleans and Chicago; the Mercantile Exchange, which deals in many farm products, in Chicago; and grain exchanges in many of the large cities of the Midwest. Some exchanges, like the Chicago Board of Trade, provide market services for several kinds of products. These trading posts where products may be bought or sold are called commodity exchanges. The security exchanges, on the other hand, are meeting places where stocks and bonds are traded. Like the commodity exchanges, they help serve the economic life of the country. But when their operations get out of hand, they may become very dangerous. In 1929, the security exchanges, or stock market, contributed to a crash-a sudden, sharp decline in the value of securities. Many people lost fortunes; many corporations were bankrupted; many workers lost their jobs. The Crash of 1929 has been attributed to many causes, among them were wild and unwise speculation by many people and dishonest practices on the part of some businessmen and of some members of the exchanges. Today, however, investing through security exchanges and trading on commodity exchanges have been made safer by regulations set up by the exchanges themselves and by regulations of the United States government. In 1922, the government instituted the Commodity Exchange Commission which operates through the Department of Agriculture; and in 1934, the Securities and Exchange Commission, to protect investors and the public against dishonest practices on the exchanges.

单选题When Lloyd Nickson is close to death, he will

单选题 {{I}}Questions 14 ～ 17 are based on the following dialogue about a part-time job.{{/I}}