PREP2-17

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17. (25335-!-item-!-188;#058&002335)



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--better control and possibly

eradication of infections like  

A C

想要问下D为什么错呢 SOMETHING后面的主语是能够省略的吗 除了那个POSSIBILITY和PERHAPS的重复使用

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UPUP