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英语
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They have been to Beijing for two days.变否定句,一般疑问句,特殊疑问句.要正确率高的,
人气：208 ℃ 时间：2020-01-29 14:04:55
解答
They haven't been to Beijing yetHave they been to Beijing for two days?How long have they been to Beijing?
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