问题
选择题
—Mum, may I watch TV now?
—No, you ______ finish your homework first. [ ]
A. mustn't
B. must
C. need
D. can't
答案
答案：B
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—Mum, may I watch TV now?
—No, you ______ finish your homework first. [ ]
A. mustn't
B. must
C. need
D. can't
答案：B