【题目】We must do whatever we can _____ the river _____ any more.
A. to keep; polluted B. to prevent; being polluted
C. keep; polluted D. prevent; being polluted
在线课程【答案】B
【解析】
试题分析：考查动词短语辨析。句意：我们必须尽我们所能去阻止这条河流再被污染。Do whatever we can to do 做我们所能做的去做某事，prevent sb from doing阻止某人做某事，故选B项。
考点 : 考查动词短语辨析