Question

Everyone here will thank the firefighter for the things they have done to prevent fires______ the environment safer.

A．make             B．to making          C．to make           D．from making

Answer

C

【解析】

试题分析：这里prevent fires （“预防火灾”）的目的是to make the environment safer，动词不定式表目的；本题容易误选D. from making，这是因为受到prevent sth/sb from doing sth句型的误导。要特别注意。故选C。

考点：考查非谓语动词的用法。