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

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 本题可用排除法。根据空格处的意思“尚未取得突破”可知A选项不正确，就排除了A。因为句子主语是“breakthroughs”，所以要被动语态，B、D选项也被排除。因此正确答案为C。
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