Lifetodayhasmanyprob的精选

问题详情：      Lifetodayhasmanyproblems.Oneofthebiggestis 41（pollute）.Waterpollution 42      (make)ourriversandlakesdirty.Itkillsourfishandpollutesourdrinkingwater.Noisepollutionmakesustalk...