4、thepassageweknowthatsomestudentsoften_______intheschool.A.eattoomuchB.don’tworkhardC.wastethingsD.throwrubbisheverywhere2.Whichisnotmentionedinthispassage?A.Freshwater.B.Forest.C.Oil. D.Coal.3.Whatmayhappenin100years?A.Wemaystillhaveenoughoil. B.Wemaystillhaveenoughcoal.C.Wemayhavealittleoil. D.