Bob called to tell his mother that he couldn’t enter the house, for he his key at school.A. had left B. would leaveC. was leaving D. has left 题目和参考答案——青夏教育精英家教网—

题目内容

Bob called to tell his mother that he couldn’t enter the house, for he ________ his key at school.

A. had left B. would leave

C. was leaving D. has left

【解析】

试题分析：考查时态。原意是鲍勃打电话给他妈妈说房子进不去，因为之前他把钥匙落在学校了。可知把钥匙落在学校的动作发生在他给他妈妈打电话之前，called为过去时，因而所选的的动词为过去完成时，故选A。

考点：考查时态变化

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