China’s economic reform is aimed at separating enterprises from the government. It has been implemented for almost 20 years, but

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问题 China’s economic reform is aimed at separating enterprises from the government. It has been implemented for almost 20 years, but breakthroughs ______.

选项 A、have been made yet
B、have yet to make
C、have yet to be made
D、to have yet made

答案C

解析 排除法:首先,根据句意,显然是说尚未取得突破,排除A;根据主动和被动关系可排除B、D两项,故选C项。
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