When where he had put the book, he kept silent.A. askB. askingC. to askD. asked

发布时间：2020-08-16 21:35:33

When      where he had put the book, he kept silent.
A. ask
B. asking
C. to ask
D. asked

网友回答

A. ask
B. asking
C. to ask
(答案→)D. asked
解析：考查省略句。当状语从句的主语和主句主语一致时，我们可以把状语从句的主语和系动词一起省略。本题省略了he was;句意：当他被问把书放到那里的时候，他什么都不说。
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