It is unfair, ________?A.is itB.isn't itC.does itD.doesn't it?
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B解析首先前面使用了动词be，排除C，D选项。含有否定前缀构成的词虽然意思是否定的，但仍然按肯定结构来对待。所以后面应用isn't it而不用is it来构成反意疑问句；但如果前面用了否定意义的副词或代词做状语或主语时，要按否定结构来对待，后面的反意疑问句应用肯定形式．如：(1)．He seldom es to school on time, does he? (2)．There is nothing difficult in the world if you put your heart into it, is there?