问题
选择题
—Mum, may I watch TV after supper?
—No, You _____ finish your homework first. [ ]
A. may
B. need
C. must
D. mustn't
答案
答案：C
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—Mum, may I watch TV after supper?
—No, You _____ finish your homework first. [ ]
A. may
B. need
C. must
D. mustn't
答案：C