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题型:单选题 题类:常考题 难易度:普通

–– ________ I come back before 6 o'clock?                  
–– No, you _______ . But you ______ be back later than 7 o'clock.

A、Need; must; must B、May; mustn't; can't C、Can; can't; can't D、Must; needn't; can't
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