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【题目】The factory used 65 percent of the raw materials, the rest of which __________ saved for other purposes.

A. is B. are

C. was D. were

【答案】D

【解析】句意:工厂用掉了 65%的原材料,其余的留作他用。which引导非限制性定语从句,本句中的which指代raw materials“the rest of +名词作主语,谓语动词应与of后的名词保持一致。故本题设空处应用复数,排除AC两项;根据主句时态可知此处应用过去时,故答案为D项。

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