题目

We must ________ the act of cheating ________ a fair competition system. A．prevent; creating        B．stop; to create C．keep; from creating  D．stop; creating   答案： B 根据句意“我们必须阻止这种作弊行为来创造一个公平的竞争体制”可知第二个空格缺少目的状语，故选B项。受思维定势影响，易把此题看成是prevent/stop/keep sb./sth.from doing...句式。  

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