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 1

C

考察非谓语动词，根据句意可知该处作目的状语，
意为，这里的每个人都将要感谢 消防员，因为他们做了很多事情来阻止大火，为了让周围的环境安全。