题目内容

Mike didn’t notice Alice entering his room. He ____ a phone call.

   A.answered     B. has answered     C. was answering      D. is answering

C


解析:

本句的语义环境为:He ___a phone call when Alice entered his room表示过去某一时间正在发生.进行的动作,用过去进行时。故选C

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