题目内容
16．Thanks to the 2014Winter Olympics，Sochi is well-known，_______？（ ）| A． | isn't it | B． | was it | C． | is it | D． | wasn't it |
分析 幸亏2014冬奥会，索契出名了，是不是？
解答 前面的句子为肯定句，反意部分应为否定形式，此句为一般现在时需用isn't it．故选A．
点评 注意反义疑问句前肯定，后否定；前否定，后肯定的原则．
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