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单选题
China’s economic reform is aimed at separating enterprises from the government. It has been implemented for almost 20 years, but breakthroughs ______ .
A
have been made yet
B
have yet to make
C
have yet to be made
D
to have yet made
参考答案
参考解析
解析：
根据句意可知“改革还没有取得突破”，而且应为被动关系，由此可得出C项正确。
根据句意可知“改革还没有取得突破”，而且应为被动关系，由此可得出C项正确。
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