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12. The success of the program to eradicate smallpox has stimulated experts to pursue what they had not previously considered possible -- better control, if not eradication, of the other infections such as measles and yaws. A. what they had not previously considered possible -- better control, if not eradication, of the other infections such as B. what they had not previously considered a possibility -- better control, if not eradication, of such infections like C. something they had not previously considered possible -- better control, if not eradication, of such infections as D. something not considered a previous possibility -- better control and perhaps eradication, of other infections such as E. the possibility of what they had not previously considered possible -- better control and possibly eradication of infections like
答案是C,这里better control是什么成分啊,其什么作用? |