问题
选择题
— Can I go to the movie, Mum?
— Certainly. But you be back by ten o'clock. [ ]
A. can
B. may
C. might
D. must
答案
答案：D
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— Can I go to the movie, Mum?
— Certainly. But you be back by ten o'clock. [ ]
A. can
B. may
C. might
D. must
答案：D
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