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英语
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you ____ smoke填don't have to 还是mustn't
人气:150 ℃ 时间:2020-07-05 09:08:39
解答
mustn't 不准为什么表示不准只能用mustn't;don't have to表示不必
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must 和 have to 的异同?mustn't 和 don't have to 的异同?
英文mustn't,don't have to,doesn't have to,didn't have to有什么区别
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