Somethingmustbedonetopreventfactoriessendingoutpoisonousgasessoastoke

发布时间：2020-08-14 09:37:51

Something must be done to prevent factories sending out poisonous gases so as to keep the city _________A.pollutingB.from pollutingC.polluteD.from being polluted

网友回答

D解析考查动词搭配。keep … from doing sth.阻止某人做某事，根据句意是阻止城市被污染，故用被动，选D。
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