问题
选择题
——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
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。