——I can’t find my MP4 player.
—— You it on the desk. I saw a red one on it.
A. might have put
B. can put
C. need have put
D. must put
网友回答
(答案→)A. might have put
B. can put
C. need have put
D. must put
解析：考查情态动词。根据句意可知对过去事情的推测，故用情态动词 + have done，might have done可能做，故选A。