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1、WritingTaskTeachingFocusoSummarizethemainideathroughthetitle,topicsentencesandkeywords.oIdentifytheimportantpointstosupportthemainideaoUsepropertransitionstoweavesentencesorparagraphsWriteasummaryofexpositioninnomorethan60words.PrewritingPollutioninItsManyFormsOneofthemostse
2、riousproblemsfacingtheworldtodayispollution.Thatisthepollutionofair,landandwaterbyallkindsofchemicalssuchaspoisonousgases,wastematerialsandinsecticides.Pollutionhasupsetthebalanceofnature,destroyedmanyformsofwildlifeandcausedavarietyofillnesses.ItoccursineverycountryonEarthb
3、utismostseriousinindustrialcountries.Breathingpollutedairisverycommontomostpeople,especiallythoselivingincities.Inheavilyindustrializedareas,fumesfromcarexhaustsandthicksmokefromfactorychimneyscanbeseendarkeningtheatmosphere.Thiswouldreducevisibilityandmaketheairunpleasantto
4、breathe.Largescaleburningoffossilfuels,suchascoal,gasandoil,inhomesandindustriesalsoproducesawiderangeofpollutants.Thisincludessulfurdioxidewhichdamagesplants,destroysbuildingsandaffectshealth.Otherknownpollutantsarecarbonmonoxide,nitrogendioxideanddirtparticles.Thefumesprod
5、ucedbycarexhaustsandfactorieswouldnormallyspreadintheair,butsometimestheyaretrappedbyairlayersofdifferenttemperatures.Theresultisafog-likehazeknownassmog.Domesticrubbishisanotherveryseriouspollutionproblem.TheaverageAmericancitizenthrowsawaynearlyonetonofrubbisheveryyear.Muc
6、hofthisconsistsofplastic,metalandglasspackagingthatcannotbebrokendownnaturally.Instead,itlieswitholdrefrigerators,brokenwashingmachinesandabandonedcarsinhugepilesforyearswithoutdecaying.Eachyeartheproblemofrubbishdisposalbecomesmoreserious.Likerivers,oceanshavebeenusedasdump
7、inggroundsforwasteofallkinds.Oneoftherecentsourcesofseapollutionisoilandmillionsoftonsofitspillintotheseaeachyear.Oilnotonlypollutesbeaches,italsokillsfishandseabirds.ØStep1:Readthefollowingpassageandcompletethetable.PartFunctionI.Para.______II.Paras.______to______Title:____
8、______________________________________________________________Topicsentence