Something must be done to prevent factories sending out poisonous gases so as to keep the
Something must be done to prevent factories sending out poisonous gases so as to keep the
发布时间:2020-08-16 17:11:53
Something must be done to prevent factories sending out poisonous gases so as to keep the city . A polluting B. from polluting C. pollute D. from being polluted
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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。