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

发布时间：2020-08-16 19:33:04

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

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解析：考查短语：make use of 利用，在这里用的被动形式。句意：他们开始考虑利用这种材料干什么。所以选C。
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