问题
选择题
— Must I finish my homework tonight, Mum?
— No, you _____. You can leave some for tomorrow. [ ]
A. mustn't
B. needn't
C. can't
答案
答案：B
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— Must I finish my homework tonight, Mum?
— No, you _____. You can leave some for tomorrow. [ ]
A. mustn't
B. needn't
C. can't
答案：B