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 possible - better control, if not eradication, of the other infections like
C. something they had not previously considered possible - better control, if not eradication, of such infections as
D. something had not considered a previous possibility- better control, and perhaps eradication, of other infections such as
E. the possibility of what they had not previouly considered - better control and possibly eradication of infections like
其实what在这里既没有语法上的错误,也没有简洁性的问题(不能看出用something到底比what简洁在哪里。我看到有人说what的结构有表达a sense of exclusivity / uniqueness,但我觉得这个观点其实站不住脚)。 那我们注意到AC选项的另一处不同的地方。A在最后用的是better control of the other infections。要用the other那么就意味着前面已经谈到一个infection。前文并没有提及到infection的问题,那么这里用the other明显就不符合逻辑了。恰好C选项纠正了这个错误。