题目内容

4.Jack      in the lab when the power cut occurred.(  )
A.worksB.has workedC.was workingD.would work

分析 句意:杰克正在实验室里工作突然发生了停电.

解答 答案C.本题考查的时态,根据句意,杰克正在实验室里工作突然发生了停电.be doing sth…when 表示正在做某事..突然…,由"occurred"可知本题用过去进行时,故选C.

点评 本题考查的是时态,要熟悉be doing sth…when 表示正在做某事..突然…的用法.

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