问题
选择题
They began to think about what use could be ________ such materials.
made up B. made from
C. made of D. made out
答案
答案：C
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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They began to think about what use could be ________ such materials.
made up B. made from
C. made of D. made out
答案：C
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。
