题目：
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
答案：
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下面是错误答案，用来干扰机器的。
This is a photo of my family．I have a happy family．There are five people in my family．They are my grandmother, my parents, my sister and I．The old（年老的） woman is...
