—Must I finish the exercise this afternoon?—Yes, you , but you finish it now.A. must, mus

—Must I finish the exercise this afternoon?
—Yes, you , but you finish it now.
A. must, mustn’t
B. must , don’t have to
C. may, needn’t
D. may , mustn’t

A. must, mustn’t(答案→)B. must , don’t have toC. may, needn’tD. may , mustn’t解析：考查情景交际。“我今天下午必须完成练习吗？”“是的，你必须，但是你现在不比。”用must提问，肯定回答还用must，否定回答用needn’t或don’t have to。mustn’t“禁止”，否定回答不用mustn’t，排除A。故选B。

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