◎ 题干
- Look! Somebody_______ the sofa.
-Well, it wasn't me. I didn't do it.
A.is cleaningB.was cleaningC.has cleanedD.cleans
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“- Look! Somebody_______ the sofa.-Well, it wasn't me. I didn't do it.A.is cleaningB.was cleaningC.has cleanedD.cleans…”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。