--Look!The window is broken.Who did it --Well,it __me.A.isn't B.wasn't C.can't D.shouldn't

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--Look!The window is broken.Who did it --Well,it __me.A.isn't B.wasn't C.can't D.shouldn't

B.要用过去时态因为问句有did表示过去.

答案是B。

B

B

B

Bwasn`t

b.