问题描述：
Look!somebody____the sofa.-Well,it wasn't me.I didn't do it.A.is cleaning
Look!somebody____the sofa.Well,it wasn't me.I didn't do it.
A.is cleaning B.was cleaning C.has cleaned D.had cleaned
Look!somebody____the sofa.Well,it wasn't me.I didn't do it.
A.is cleaning B.was cleaning C.has cleaned D.had cleaned
问题解答：
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