题目内容
【题目】—When did the classroom have a power cut?
—This morning. While we ______ an English lesson.
A. have B. had C. are having D. were having
【答案】D
【解析】句意:——教室什么时候停电的?——今天早上,当我们正在上英语课。根据句中的This morning判断句子是一个过去的时间,时态用过去时;而While引导的句子通常用进行时,所以本句使用过去进行时,构成为were/was+动词现在分词,主语是we,所以系动词用were,have an English lesson“上英语课”,have的现在分词是having;故答案选D。
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