It that all the students were having lessons in the teaching buildings when the earthquake occurred.A. happens B. was happenedC. was happening D. happened 题目和参考答案——青夏教育精英家教网—

题目内容

It ____ that all the students were having lessons in the teaching buildings when the earthquake occurred.

A. happens B. was happened

C. was happening D. happened

【解析】

试题分析：考查时态。句意：当地震发生时，所有的学生碰巧正在教学楼里上课。It happened/happens that...碰巧发生某事，根据句意可知是过去的事情，用happened，故选D。

考点：考查时态

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