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最佳答案:1.I am not a doctor.are you a doctor?yes I am .No,I'm not.2.he isn't a teacher.I
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最佳答案:Does that sound very interesting?Yes ,it does.
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最佳答案:1.I am Lily.Are you Lily?Yes,I am/ No,I am not.2.Lily reads books everyday.Does
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最佳答案:一、系表结构1)肯定句:I'm 16 years old.否定句:I'm not 16 years old.一般疑问句:Are you 16 years old