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--May I pick a flower in the garden?
--No, you _________.
A.needn’tB.mustn’tC.can’tD.won’t
B

试题分析:考查情态动词用法。Needn’t不需要;mustn’t禁止,千万不能;can’t不可能;won’t不会;must必须;用与否定形式的时候,表示禁止,不允许。句意:—我可以摘一朵花吗?—不行。你千万不能这样做。根据句意说明B正确。
点评:Needn’t不需要;mustn’t禁止,千万不能;can’t不可能;won’t不会;must必须;用与否定形式的时候,表示禁止,不允许。
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