Unit4GlobalwarmingTeachingaims:TopicGlobalwarming;Pollution;TheimportanceofprotectingtheearthUsefulwordsandexpressions:Words:compare,graph,phenomenon,fuel,quantity,per,data,catastrophe,climate,consequence,state,range,glance,widespread,decrease,steady,steadily,average,existence,outer,electrical,motor,can(n.),microwave,nuclear,disagreement,titleExpressions:compareto,comeabout,quantitiesof,resultin,buildup,keepon,onthewhole,makeadifference,putupwith,solongas,andsoon3.Functionalitems:Yes,Ithinkso.Ibelievethatyou’vegotitright.Idon’tthinkso.Idon’tthinkthat’sright.I’mafraidyouarewrong.I’msorrytobringthisup,but.I’msorrytosaythis,but.Theyshouldn’thavedoneit.Theyaretoblame.Whydon’tyoudosomethingaboutit?Perhapstheyshould/oughttodo.Whatdoweuseenergyfor?Wheredoesalltheenergycomefrom?Whichenergysourcesarerenewableandwhicharenon-renewable?Sampleanswers:RenewableNon-renewableWindpowerCoalSolarpower

NaturalgasandoilHydroelectricpowerNuclearpowerStep2.ListeningTask2:SsreadthestatementsinEx1onpage31andlistentothetapetofindoutthelisteningpoints.1.Ssreadthestatement.2.Playthetapeforthefirsttime.HelptheSsgetageneralunderstandingaboutthedialogue.3.SsfindoutthelisteningpointsandfinishEx1.Task3:Secondlistening:SslistentothetapeagainandtickthephrasesthatProfessorChenusestoagreeordisagreewithLiBinonpage31.Step3.DiscussingTask4.SsreadwhatProfessorChenandLiBinsayonpage31.Then,ingroups,discusswhoyouagreewithandgivereasons.Trytousethefollowingexpressions:ExactlyThat’strue.That’sright.Iagree.I’mafraidIdisagreewithyou.I’mafraidnot.Idon’tthinkso.Noway.Idon’tagree.Period2.ReadingStep1.RevisionShowtheSssomepicturesonthescreen.TheSshavetogivenamesofdifferentenergysourcesrelativetothepicturesanddecidewhichenergysourcesarerenewableandwhicharenot.ThenasktheSstotelltheeffectsofusingtheseenergysources.Step2.Pre-readingTask1.Ssinpairs,talkaboutthegreenhouseandanswerthefollowingquestions:Whatisagreenhouse?Howdoesitwork?Whatdoyouthinkgreenhousegasesdo?Step3.ReadingTask2.Predicting:Ssreadthetitleandpredictwhatthetextwilltell.Task3.SsreadthepassageforthefirsttimeandtrytofinishEx2onpage27.Suggestedanswers:True:3,5,6,7,8False:1,2,4,9,10Task4.Ssreadthepassageagainandtrytodividethewholepassageintoseveralpartsandsummarizethemainideaforeachpart.Whilereading,payattentiontothewritingskills.Mainideasofeachpart

WritingskillsIntroduceadebateovertheRaisingaquestionissueofglobalwarming.(paragraph1)IllustratehowglobalwarmingGivingexamples,usinggraphs,comesabout.explanation.(paragraphs2-4)ListtwodifferentattitudesGivingexamples,makingamongscientiststowardsglobalcontrast.warming.(paragraphs5-10)It’suptoreaderstothinkandUsingaquestion,leavingdecidewhetherpeopleshoulddoreaderstothinkovertheissue.somethingaboutglobalwarmingornot.(paragraph11)Task5.SsreadagainandtrytogettheanswerstothequestionsofEx1onpage27.Step4.After–readingTask6.Debate:gettheSstodebateoverthestatement:Weshoulddonothingaboutglobalwarming.Getintogroupsofsix.Decidewhichthreeinyourgrouparegoingtoagreewiththestatement(GroupA)andwhichthreearegoingtodisagreewiththestatement(GroupB).GroupAdiscusswhytheyagreewiththestatement;GroupBdiscusswhytheydisagree.GroupAandBgettogether.Telleachotherthereasonswhyagreeordisagreewiththestatement.Theniftimepermitted,sharetheiropinionsinclass.runout用盡；沒有了Thesupplyoffoodalmostranoutandwefelthelpless.Wecouldseehispatiencerunningoutlittlebylittle.trap:誘捕；使墮入窘境Sandandleavestrappedthewaterinthestream.Theyfinallytrappedthemouseinacage.3.resultin惹起某種結果Hiswildlanguageresultedinacompletefailure.resultfrom惹起某種原由此產生Theroadaccidentresultedfromfoggyweather.4.by表數目的增減程度Thepricehasbeenincreasedby10%.Theyescapeddeathbyinches.buildup齊集；集結Asweriseslowly,.Potentialenergyisbuiltup.Thesongbegantobuilduptoaclimax.evenif/thoughBelieveus.Wewillbackyoutotheendevenifyoufall.keepondoing=continue/goondoingWekeptonstudyinglateintothenight.Hekeptontalkingafterthebellrangforclass.8.onthewhole總的來說Wemetsomethingunhappy,butonthewhole,weenjoyedourstaythere.Onthewholeourbusinesswasgoingonsmoothly.9.putupwith忍耐；容忍hehadaneccentriccharacterandmysisterfoundithardtoputupwithhim.Asaresult,theygotdivorced.Hecouldn’tputupwiththenoisesohekeptthewindowsshutalldaylong.10.solongas(aslongas)只需I’mhappyaslongasyouarehappy.Aslongasyoukeepawayfromthem,theywon’tdoyouanyharm.Step3LearningaboutlanguageSsdopart1and2onpage28.Step4.Grammar:Theuseof“it”:itusedforemphasisit在重申構造中重申句型：Itis(was)+被重申部分+that(who)+其余重申例句說明部分主ItisIwhoamtoblame.原句的謂語動詞假如是此刻語是我該受責備。或將來時態用ItisItwasyourunclethat(who)camethat(who)假如原句謂語動yesterday.詞是過去時態，則用It昨天來的是你叔叔。wasthat(who)。在賓ItwasanewpenthatMothergave重申時間，地址，原由或方語me.式時不要用when,where,母親給我的是一支新鋼筆。how,一定用that。地址ItwasintheclassroomthatIleftmyumbrella.我把雨傘就落在了教室里。時Itisateleventhatthetrain狀間leaves.火車是在十一點鐘走開。方ItwasjustasheorderedthatI式acted.我正是照他囑咐的那樣做的。語原Itwasbecausehewasintrouble因thatItriedmybesttohelphim.正是由于他處境困難我才全力幫助他。賓補Itwasredthatwepaintedthegate.我們把門油漆成紅的顏色。Itwaschairmanthattheyelectedhim.他們選他擔當的是主席的職務。Step5.PracticeSsdoEx2onpage29.Period4.ExtensiveReadingStep1.Pre-readingTask1:Ssingroupsdiscusstheimportanceofreducingtheamountofcarbondioxideintheairandwhatwecandoinourdailylife.Step2.ReadingTask2:Ssskimthetwolettersandfindwhothewritersareandwhattheirpurposeofwritingthelettersis.Keys:Thefirstletteriswrittenbyastudentwhoisaskingforsuggestionsforhisproject—globalwarming.ThesecondletteriswrittenbyaneditorofEarthCaremagazine.HeofferstheSssomesuggestionsonwhattodoaboutglobalwarming.Task3:Ssreadthetwolettersagainandfinishthefollowingform.Earthcare’ssuggestionsCanyoucarryitout?ReasonsIfyouarenotusingSaveenergyelectricalappliances,turnYesthemoff.Ifyou’recold,putonmoreYesSaveenergyclothsinsteadofturningupYestheheat.MotorvehiclesusealotofYesSaveenergyenergy,sowalkorrideabikeifyoucan.Recyclecans,bottles,SaveenergyplasticsandnewspapersandYesbuythingsmadefromrecycledmaterials.GetyourparentsorfriendstoYesSaveenergybuyproductsthataremadetoYessaveenergy.PlantmoretreesYesSaveenergyTalkwithyourfamilyandYesSaveenergyfriendsaboutglobalwarmingandtellthemwhatyou’velearned.Task4:Ssinpairs,makeaposterforyourschoolthattellsstudentsvariouswaystheycanreducetheamountofcarbondioxideintheair.?giveyourposteralargeheading;?useimperativesentencestolistthewayswecanreducetheamountofcarbondioxideintheair;trytomakeyourposterimpressivePeriod5.DrillsStep1.Listening(page62)Task1:SslistentothetapeandfinishEx1and2onpage62.aboutthedialogue.2.Secondlistening:Sslistenandtrytopickoutspecificinformation.Step2.TalkingTask2:Plasticbagsareabigenvironmentalproblem.Imaginethatyouwanttodosomethingaboutit.Insmallgroups,discussthequestionsonpage63.Thefollowingexpressionswillhelpyou.I’msorrytobringthisup,but.I’msorrytohavetosaythis,but..Theyshouldn’thavedoneit.Theyaretoblame.Perhapstheyshould/oughttodo.Whydon’tyoudosomethingaboutit?Step3.Listeningtask(page65)Task3:Sslistentothefollowingform.YearEvent

Tom’stalk

aboutCleanUpAustraliaFactsabouttheevent

DayandfinishStep4.Speakingtask(page65)Task4:likeAustralia,ChinaalsohasaCleanUpDay.Ingroupsofthree,planatalkaboutCleanUpChinaDay.Followthesesteps:UseatableliketheoneabovetodiscusswhatyouknowaboutCleanUpChinaDay.Makenotesinthetable.Makeachartofwhatyouthinkthetoprubbishitemsmightbe.3.Usethenotestoprepareyourtalk.Donotwritedownyourwholetalk.Practiceyourtalkusingyournotes.Step1.ReadingTask1:Ssreadthepassageonpage66andtrytofillinthefollowingform.TwoofthemostcommonanddangerousPara.1Pointofviewlitter:cigarettebuttsandplasticbags.Para.

2

Firstpointoftheargument;Evidence

Cigarettebuttsaresmallbutbadfortheenvironment:over1,600billioncigarettesaresmokedeachyearandlargequantitiesofbuttsarethrownaway;buttscontaintoxicchemicals;decreasethequalityofwater;endangerofplantsandanimals.Para.

3

Secondpointoftheargument;Evidence

Plasticbags