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Look!somebody____the sofa.-Well,it wasn't me.I didn't do it.

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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.
选C
这里强调的是过去发生的动作对现在的影响.所以要用完成时态.同时,这个过去发生的动作到说话时已经完成,而不是一直进行下去,所以用现在完成时.(如果一直进行下去,并有可能持续到将来,就用现在完成进行时)
意思是:看,沙发已经被清理干净了.呃,不是我做的.