◎ 题干
---- What was wrong with you yesterday evening?
---- I ____ my homework when the light went off suddenly.
A.doing B.was doing C.did D.have done
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“---- What was wrong with you yesterday evening?---- I ____ my homework when the light went off suddenly.A.doingB.was doingC.didD.have done…”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。