im和un为前缀的反义疑问句:1、Your father is unhappy, isn’t he?你父亲不高兴,是吧?2、They are unfair,aren't they?他们不公平,不是吗?3、He is unable to help us , isn’t he ?他不能帮助我们,不是吗?4、The students were impolite, weren't they?那些学生没有礼貌,不是吗?5、Nothing is impossible if you put your heart in it, isn't it? 只要你用心,没有什么是不可能的,是吗?
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