题目内容

7．He's posted the letter，_________ he？（　　）
A．isn'tB．doesn'tC．hasn'tD．wasn't

分析 他已经把信寄掉了，对吗？

解答 答案是C．本题考查省略句的反义问句．反义问句的基本结构是"陈述句+简略疑问句？"，陈述句用肯定，则疑问句用否定；陈述句用否定，疑问句用肯定；疑问句中的主语和助动词与陈述句一致；题干中"He's posted"完整的表达是"He has posted"，故问句中的主语和助动词与"He has"一致，所以答案选择C．

点评 反义问句的解题，首先理解反义问句的作用--证实上文的内容；其次理解反义问句的基本结构；并且积累常见的特殊结构，最后结合语境判断．

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