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人教新课标选修六UnitGrammar.docx

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人教选修6Unit4GlobalWarming Grammar Teachingmaterial NSEFCBook6——Unit4 Teachingaims Enablethestudentstomastertheusageoftheformitis/was...that..... Teachingimportantpoints Howtoenablethestudentstoknowthestructureandtheusageoftheformitis/was...that.... Teachingdifficultpoints Howtohelpthestudentstomastertheusageoftheformitis/was...that.... Teachingaids taperecorder,slides Teachingprocedures Step1Revision T:Firstlet’scheckanswers.(slideshow) Discoveringusefulwordsandexpressions.(P28) 1.CharlesKeelingcollected______onthecarbondioxidecontentintheatmosphereoveraforty-yearperiod.Hefoundthattheamountofcarbondioxide_______increasingduringthattime. 2.Althoughweareburningcoalinhuge_________everyyear,wewon't________ofitforcenturies. 3.Iftheamountofgreenhousegasescontinuesto_______wecouldbefacingaglobal__________. 4.Manyscientistsbelievethatglobalwarminghas__________throughtheburningoffossilfuels.Theydonotthinkthatignoringtheissueisworththe____. 5.______describesweatherconditionsoveraperiodofyearsinaparticularplace. 6.The_____________ofarisingsealevelwouldbewidespreadflooding. 7.TheuseofenergyinSusanna'scountryislow______________theuseofenergyintheUSA. 8.Thewarmingoftheearthisa_____________thatcausesgreatconcern. 9.The________showstemperaturechangesduringthe20thcentury. 10.Onehectareofforestcanabsorb23tonsofcarbondioxide____year. Keys：1.datakepton2.quantities;runout3.buildup;catastrophe 4.comeabout;risk5.Climate6.consequence7.comparedto8.phenomenon 9.graph10.per AnswerkeysforEx.2onPage28: Thefirstgraphshowstheglobal_______________between________and_________Thetemperature__________anddecreasedoverthisperiodbutonthewholeit_________byaround_________anditshighestin2000.Therewasasteady_________________inthetemperatureduringthetwentyyearsafter1980.Wecanseefromthegraphthattheearthhasbecome___________sinceearlylastcentury. Thesecondgraphshowstheamountof______________intheatmospherefrom________to_______.Thecarbondioxide__________steadilyoverthisforty-yearperiod.Itwentupfrom315to370parts_____