题目

The results of the study indicated that it was the type of fat ____ made the difference. A．that            B．what         C．who          D．as   答案： A   考查强调句型。强调句型的结构为：“It is / was+被强调部分+that+句子其他成分”，判断的依据为去掉"It is / was... that..." 后，剩下的句子仍然完整。据此判断此处强调 the type of fat，故选A项。  

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