cPollutionmeansaddingdirtyorharmful(有害的)thingstolandairwaterandsoon.Asaresulttheyarenolongerpleasantorsafetouse.Pollutionisbadforanimalsandplantsanditevenmakespeople'shealthindanger.Inourdailylifewecanseedifferentkindsofpollutioninmanyplaces.Therearethreemainformsofpollution;landpollutionairpollutionandwaterpollution.

Landpollutioniscausedbysolidwastesuchascansbottlesandsomeplasticthingswhicharen'tbrokendownquickly.Itmakestheenvironmentlookverybad.Howeverairpollutionismoreseriousthanlandpollution.Itismuchworseincitiesandtownsbecauseofthefumes(废气)fromtrafficandthewastefromhuman(人类)activities.WhenpeopledrivetheircarsfumeswhicharemostmadeupofC02，N02andS02aregivenoff.Afterthegasesgetintotheairtheymaymixwithclouds.Thentheywillbecomesomeharmfulchemicalsfallingonthegroundwithrain.Itisoneofthereasonsforsoilerosion(土壤侵烛)whichisoneexampleofwaterpollution.

Variouskindsofpollutionwillcausemanyhealthproblems.Peoplehaverealizedtheymustchangethisserioussituation.Therearemanywaystocontrolpollution.Todevelopalternativeenergy(替代能源)isverypopularinmanycountries.Chinaforexamplehasmadeupitsmindtobealeaderinthisfield.Itistryinghardtomakefulluseofenergyfromthesunandwind.Ithaspaidplentyofmoneytomakeelectriccarsandtrainsinsteadoftraditionaltraffic.Weshouldalsotakeactiontomakeourenvironmentcleanereveryday.Takeclothbagswhilegoingshoppinganddrivecarsless.Wehaveonlyoneearth.Wemusttakesmallstepsnowtohelpprotectourenvironmentforthefuturewhereverweare.

( )11.Theunderlinedword"solid"inthepassagemeans"       ”inChinese.

   A.气体   B.液体   C.固体

( )12.Whenpeopleliveinapollutedarea.

   A.theywillcontroltheuseofalternativeenergy

   B.theirhealthwillbeindanger

   C.theywillgetstrongerandstronger

( )13.Picture      tellsushowharmfulchemicalspolluteourenvironment.

( )14.Whichofthefollowingistrueaccordingtothepassage

   A.Thereareonlythreeformsofpollution.

   B.Chinadoesn'twanttodevelopotherkindsofe