My MP4 player isn't in my bag .Where____I have put it

问题描述:

My MP4 player isn't in my bag .Where____I have put it
My MP4 player isn't in my bag.Where___I have put it?
A.can B.must C.should D.would
请问答案为何是 A 这与 have put 这个完成时态

这里的“can”,表示可能的意思