[单项选择] On the past few days, two nations with large numbers of AIDS-infected people have announced plans to distribute a triple cocktail of life-prolonging antiretroviral drugs free to all who need it. China has been treating 5 ,000 patients and plans to expand the program to cover everyone in the country. South Africa’’s cabinet approved a plan that includes drugs for all who need them. China spent years denying it had an AIDS problem. Until recently, South Africa’’s top officials minimized the epidemic, questioned whether H.I. V. was the cause of AIDS and labeled antiretroviral drugs "poisons". Both countries have now taken a courageous and essential step. But only one is likely to succeed. Indeed, China’’s program is already failing. One in five Chinese who have received antiretroviral drugs has already stopped taking them, which can lead to the creation of drug-resistant strains of the virus. China has only about 100 doctors nationwide with experience in treating AIDS. Healt
A. bring up some facts about AIDS preventing and curing in the world.
B. urge Chinese government to do something about AIDS.
C. compare two countries in the AIDS-related work.
D. say something about the development in the AIDS preventing method.

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[单项选择] On the past few days, two nations with large numbers of AIDS-infected people have announced plans to distribute a triple cocktail of life-prolonging antiretroviral drugs free to all who need it. China has been treating 5 ,000 patients and plans to expand the program to cover everyone in the country. South Africa’’s cabinet approved a plan that includes drugs for all who need them. China spent years denying it had an AIDS problem. Until recently, South Africa’’s top officials minimized the epidemic, questioned whether H.I. V. was the cause of AIDS and labeled antiretroviral drugs "poisons". Both countries have now taken a courageous and essential step. But only one is likely to succeed. Indeed, China’’s program is already failing. One in five Chinese who have received antiretroviral drugs has already stopped taking them, which can lead to the creation of drug-resistant strains of the virus. China has only about 100 doctors nationwide with experience in treating AIDS. Healt
A. criticize.
B. abort.
C. depreciate.
D. disregard.

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[单项选择]Two days (past) (before he) realized that the task was (beyond) his (capacity).（）
A. past
B. before he
C. beyond
D. capacity

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[单项选择]In the past few decades, remarkable findings have been made in ethnology, the study of animal social behavior. Earlier scientists had (61) that nonhuman social life was almost totally instinctive or fixed by genetics. Much more careful observation has shown that (62) variation occurs among the social ties of most species, showing that learning is a part of social life. That is, the (63) are not solely fixed by the genes. (64) , the learning that occurs is often at an early age in a process that is called imprinting. Imprinting is clearly (65) instinctive, but it is not quite like the learning of humans; it is something in between the two. An illustration best (66) the nature of imprinting. Once, biologists thought that ducklings followed the mother duck because of instincts. Now we know that, shortly (67) they hatch, ducklings fix (68) any object about the size of a duck and will henceforth follow it. So ducklings may follow a ba
A. considerate
B. considerate
C. considerable
D. considering

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