1. 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. something they had not previously considered possible—better control, if not eradication, of such infections as
答案是(B), 为什么(A)错了? |