[题目]Helen her keys in the office so she had to wait until her husband home.A. has left; comes B. left; had comeC. had left; came D. had left; would come 题目和参考答案——青夏教育精英家教网—

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【题目】Helen ______ her keys in the office so she had to wait until her husband ______ home.

A. has left; comes B. left; had come

C. had left; came D. had left; would come

【答案】C

【解析】试题分析：句意：海伦把钥匙落在办公室了，所以她得等自己的丈夫回家

根据主句和从句两个动词的先后顺序可以判断，丢钥匙在前，回家再后，且都为过去式，所以前者用过去完成时，后者用一般过去式

考点:考察动词时态的用法

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