题目

The factory used 65 percent of the raw materials, the rest of which ________ (be) saved for other purposes. 答案：were　句意：这家工厂使用了65%的原材料，其余的节省下来以作他用。后半句中的the rest of which中的which指的是raw materials，所以谓语动词用复数；再结合主句中的时态可判断，正确答案为were。

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