题目内容
Everyone here will thank the firefighters for the things they have done to prevent fires _______ the environment safer.?
A. make B. to making ?
C. to make D. from making?
C
解析:
从语法角度考虑可排除A、B两项,D项符合语法,但句意不妥,C项不定式结构表结果。?
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