题目内容

I can’t find my socks. Where ________ I have dropped them?
A．mustB．canC．wouldD．should
B

试题分析：此处must必须，一定；can可能； would会，过去常常；should应该。此处是can have done的形式，表示对过去发生事实的推测。故选B。句意：我找不到我的袜子。我可能把它们放哪里了呢？can 表推测用于疑问句和否定句。
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