◎ 题干
_____ when the light went on last night?
A.What were you doingB.What have you done
C.What did you do D.How were you doing
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“_____ when the light went on last night?A.What were you doingB.What have you doneC.What did you do D.How were you doing…”主要考查了你对  【一般现在时】【过去进行时】【过去完成进行时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。