问题

Everyone here will thank the firefighters for the things they do to prevent fires ______ the environmentsafer.[ ]

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

正确答案是：

同类题型

My brother likes to play ______ football ______ Saturday evening.

下列各句中，没有语病的一项是

We may meet all kinds of difficulties in the future， but we should be confident enough to any challenge.

getting better by degrees, but itwill be some time _____ she is completely well

Miss Wang’s class is very interesting. — _ _ _ .We all like her class very much.