Look!Somebody the sofa.Well it wasn’t me. I didn’t do it.A. is cleaningB. was cle

问题补充：

--- 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

答案：

A. is cleaning

B. was cleaning

(答案→)C. has cleaned

D. had cleaned

解析：考查时态：句意：---看，沙发已经被清理干净了。---呃，不是我做的。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。选C。