It is well known to us all that a lot of rivers _______by factories.A.are pollutingB.have been pollu

题目简介

It is well known to us all that a lot of rivers _______by factories.A.are pollutingB.have been pollu

题目详情

It is well known to us all that a lot of rivers _______by factories.
A.are pollutingB.have been polluting
C.are being pollutingD.are being polluted
题型:单选题难度:偏易来源:不详

答案

D
考查时态语态,river和pollute是被动关系,但四个选项只有D项是现在进行时的被动,句意是:众所周知的是很多河流正在被工厂污染。选D。

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