He was surprised at____about itA.having asked B.having been askedC.being asked D.asking答案应该选B,为什么不能选C?请说明原因,

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He was surprised at____about itA.having asked B.having been askedC.being asked D.asking答案应该选B,为什么不能选C?请说明原因,
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He was surprised at____about itA.having asked B.having been askedC.being asked D.asking答案应该选B,为什么不能选C?请说明原因,
He was surprised at____about it
A.having asked B.having been asked
C.being asked D.asking
答案应该选B,为什么不能选C?请说明原因,

He was surprised at____about itA.having asked B.having been askedC.being asked D.asking答案应该选B,为什么不能选C?请说明原因,
因为他被问到这个是在他感到吃惊之前,原句中主句是过去时,所以从句由过去时变为过去完成时.

考非谓语动词…having been done 和 being done 都可表示被动,但是前者存在先后顺序,即having been done 的内容先于主句发生…我先被问然后惊讶。