题目内容
A: Mum, may I go out to play football for an hour?
B: No, you_ . The air outside is not very clean.
A. can't B. needn't C. couldn’t
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题目内容
A: Mum, may I go out to play football for an hour?
B: No, you_ . The air outside is not very clean.
A. can't B. needn't C. couldn’t