问题: 一道选择题
Nowadays in China some officers are unfit for their positions, _______?
A. are they B. aren't they
C. don't they D. do they
请问选哪个？谢谢！
解答:
选B 原因如下：
否定前缀不能视为否定词，其反意疑问句仍用否定形式。
It is impossible, isn't it?
He is not unkind to his classmates, is he?
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