New ways have been found to prevent the river .A.not to be pollutedB.against pol
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New ways have been found to prevent the river ______.
A.not to be polluted
B.against polluting
C.from polluting
D.from being polluted
试题答案
D
固定词组。Prevent sb (from) doing sth阻止某人做某事；句意：新的方法已经被发现来阻止河流被污染。