It ____ that all the students were having lessons in the teaching buildings when the earthquake occu...
2022-11-10 05:17:16 34次 2014-2015学年安徽宿州高一上期中英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
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
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