问题
选择题
—Mum, _________ I go out to play table tennis?
—Yes, you can. But you had better come back early.[ ]
A. must
B. need
C. may
答案
答案：C
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—Mum, _________ I go out to play table tennis?
—Yes, you can. But you had better come back early.[ ]
A. must
B. need
C. may
答案：C