单项填空

①—I missed the first part of the film. It was really a pity.

—You       home half an hour earlier.(2010·福建厦门一轮检测)

A. should have left                B. must have left

C. should leave                     D. must leave

②—Do you think he is lazy?

—I             so once, but I don’t now.(2010·浙江杭州一轮检测)

A. may have thought            B. can have thought

C. may think                         D.  might think

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①解析：选A。第一句句意为：我错过了这部电影的第一部分，真遗憾。根据第一句，答句的句意应为：你本应该提前半小时出家门。故选A。

②解析：选A。从答语可知，空格处的意思是“曾经这样想过”，即对过去情况作推测，故应用“情态动词＋动词完成时”；又因为 can 表推测时不用于肯定句中，故选A。