Did you hear anybody knock at the door?No ,I ____ to my MP3

来源：学生作业帮编辑：灵鹊做题网作业帮分类：英语作业时间：2024/04/27 23:59:54

Did you hear anybody knock at the door?No ,I ____ to my MP3 .
A,have listen B,listened C,was listening D,Listen

选C
问：有没有听到有人敲门?
回答：我当时正在听MP3；表示过去正在进行的动作
希望可以帮到你哈!
再问：他好像没有刻意地说有人来找是有什么事，也没问我是具体哪个时间，怎么说当时额。
再答：要看这句话的语境的，当时有人敲门，说明当时的动作是正在进行的，因而要用过去进行时哈！

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