Somethingmustbedonetopreventthefa

发布时间：2020-07-26 19:29:14

Something must be done to prevent the factory ________ poisonous gases so as to keep the city ________．A.sending out; from pollutingB.send out; pollutingC.from sending out; from pollutingD.sending out; from being polluted

网友回答

D
以上问题属网友观点，不代表本站立场，仅供参考！