问题补充:
——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
答案:
(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。