They began to think about what use could be made such materials.A. up B. fromC. of D. out

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【题目】They began to think about what use could be made ________ such materials.

A. up B. from

C. of D. out

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【答案】C

【解析】考查固定用法。句意：他们开始思考用什么材料可以做成这种东西。make use of利用，是固定用法，所以选C。