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最佳答案:肯定回答:Yes,there is否定回答:No,there is not
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最佳答案:肯定回答:Yes,it is.否定回答:No,it isn't.(句子开头的第一个字母一定要大写)
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最佳答案:This isn't a book.Is this a book?Yes,it is.No,it isn't.请指出,希望能和你一起探讨~如果认为我的回答好的话
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最佳答案:may I do...Yes,you may.No,you can't/ mustn't.Can I do sth?Yes,you can.No,you can
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最佳答案:一般现在时L'm a student. l'm not a student Are you a student?一般将来时l'll be a student.