-What are you doing, mum?-I the house.A. clean B. cleans C. am cleaning D. is cleaning C [解析]试题句意:-妈妈.你正在做什么?-我正在打扫房间.根据句意及题干分析此题应用现在进行时回答.主语是I.故选C. 题目和参考答案——青夏教育精英家教网—

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—What are you doing, mum?

—I _____________ the house.

A. clean B. cleans C. am cleaning D. is cleaning

C 【解析】试题句意：—妈妈，你正在做什么？—我正在打扫房间。根据句意及题干分析此题应用现在进行时回答，主语是I，故选C。

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