3、river.Listenagainandcheck(√)thesentencesyouhear.1,Wecouldgofishingintheriver.()2,Theriverwasreallydirty.()3,Theriverhasalwaysbeenthenicestriverinthistown.()4,Weshouldasktheteachersforhelp.()Languagepoints.1. We are trying to save the earth.2. Peoplearethrowinglitte