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单选题
54.All these dictionaries are a great help to you, ?
A
A. are they
B
B. are all these dictionaries
C
C. aren＇t they
D
D. aren * t all these dictionaries
答案解析
正确答案：C
解析：
54.【翻译】所有这些词典对你都有很大帮助，不是吗？【精析】C 一般情况下,反意疑问句部分应与陈述句部分的主语和谓语保持一致，并且前肯定后否定，反之亦然 如果陈述句部分的主语是名词，反意疑问句部分的主语应用相应的代词。本题陈述句部分的主语是All these dictionaries,所以反意疑问句部分的主语应用they。故选Cc
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