He stood there, not knowing .A.how to doB.what to doC.what to be doneD.what was
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He stood there, not knowing ________.
A.how to do
B.what to do
C.what to be done
D.what was to do
试题答案
B
解析：导解：疑问词+不定式结构相当于一个名词性从句．what to do相当于what he should do.注意这种结构中不出现被动语态．A项须改为how to do it; D项应该为what he was to do或what was to be done.