Question

—Does your uncle still smoke?

—He ____________given it up. It’s two years ever since he ____________.

A. can’t have; smoked                          B. may have; smoked

C. should have; has smoked                         D. should have; didn’t smoke

Answer

B

【解析】

试题分析：句意：---你叔叔还抽烟吗？---他可能已经戒掉了吧。从他抽烟到现在已经两年了。may have done... 用来对过去情况进行推测；should have done... 应该做而没做， 用在虚拟语气中。根据句意故选B。

考点：考查情态动词的用法。