. They did everything they could to prevent the pollution ______ the river. A．protecting B．to protec...
2023-01-11 12:03:23 134次 吉林省2009-2010学年高一下学期期中考试试题（英语） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
. They did everything they could to prevent
the pollution ______ the river.
|
A．protecting
|
B．to protect
|
C．from being protected
|
D．from protecting
|
本题链接：
