Unit 2 Saving the Earth Topic 2 Section D 示范公開課教學(xué)課件【九年級(jí)英語上冊(cè)仁愛版】

Unit2SavingtheEarthSectionDTopic2

Alltheseproblemsareveryserious.IndefinitePronounandAdverb_______ofuslikespollution.Don’tspit___________inpublic._________shouldcareforwildanimalsandplantmoretrees.Weshoulddo___________wecantoprotecttheenvironment.NoneanywhereEveryoneeverythingFillintheblanksRevision______aresult

(結(jié)果),alotofrichlandhaschanged_______(變?yōu)?desert.Treescanstopthewindfrom_________theearth_____(吹走).Weshouldn’tleaverubbish_____________(到處).Alltheseproblemsareveryserious,____(所以)wemustdosomethingnow.FillintheblankswiththewordslearntinSectionsA-CintoblowingawayhereandtheresoAsRevisionPre-readingLookandlearnTherearefourlargeoceansontheearth.Waterresourcesareveryrichontheearth.Nearly3/4oftheearthiscoveredwithwater.Althoughthereisplentyofwater,westillfacetheproblemofwatershortage.Imagineyouarewater.

Pleasetellusyourfunctions,problemsandwishes.Tips:I’mwater.Iusedtobe…Factoriesusuallypour…Iwishhumanbeings…Pre-readingFreetalkReadtheparagraphsandfindoutthemainideaofeachparagraphA.Theseaseemstohavethebestanswer.Thereisplentyofwaterinthesea.But

weneedtotakethesaltawayfromthe

seawater.Thisisveryexpensive.If

scientistscanfindcheaperwaystodoit,

wecansolvetheproblemofthe

shortageofwater.While-readingThemainidea:____________________________________________________________Wewillfindthesolutionoftheshortageofwaterfromthesea.B.Howcanweavoidaseriouswatershortage?

First,weshouldsavewaterandnotwasteit.

Second,weshouldprotectourwater

resourcesandnotpollutethem.Third,we

shoulddiscoverwaystoreusewater.

Scientistshavemadesomeprogressinthis

field.Today,somelargecitiesarereusing

theirwater.Butpeople’sneedforwateris

increasingdaybyday.Westilldon’thave

enoughwater.Whatelsecanwedo?While-readingThemainidea:________________________________________Wecanavoidthewatershortageinmanyways.C.Althoughtheworldishungry,itiseven

thirstier.Whilenearly3/4oftheearthis

coveredwithwater,wearestillshortof

drinkingwater.Thisisbecauseabout97%

ofthewaterontheearthisseawater.Sowe

can’tuseitforwateringplantsordrinking

directly.Humanscanonlydrinkanduse

freshwaterfromplacesincludingrivers,

lakesandunderground.While-readingThemainidea:________________________________________Weareshortofdrinkingwaternow.PuttheparagraphsinthecorrectorderA.Theseaseemstohavethebestanswer.…B.Howcanweavoida

seriouswatershortage?…C.Althoughtheworldis

hungry,itiseventhirstier.…While-readingThemainidea:Wewillfindthesolutionoftheshortageofwaterfromthesea.Themainidea:Wecanavoidthewatershortageinmanyways.Themainidea:Weareshortofdrinkingwaternow.132Readagainandanswerthequestions1.Whyisourworldthirstywhen3/4oftheearthiscoveredwithwater?2.Whatcanwedonowtoavoidthewatershortage?3.Whatwillbethebestwaytosolvetheprobleminthefutureinthepassage?Becauseabout97%ofthewaterontheearthisseawater,wecan’tuseitforwateringplantsordrinkingdirectly.First,weshouldsavewaterandnotwasteit.Second,weshouldprotectourwaterresourcesandnotpollutethem.Third,weshoulddiscoverwaystoreusewater.Tofindcheaperwaysoftakingthesaltawayfromtheseawater.While-readingplentyof=lotsoftakeAawayfromB從A處拿走Bmakeprogressin在……方面取得進(jìn)步daybyday日復(fù)一日becoveredwith…充滿……beshortof……短缺LanguagepointsPost-reading1.Howcanweavoidaseriouswatershortage?avoidv.防止，避免+n.+pron.+v.-ingWhatshould

we

do

to

avoid

the

problem?

WherecanIgotoavoidhim?

Heavoidedansweringmyquestions.不定式不能做avoid的賓語Post-reading2.Third,weshoulddiscoverwaystoreusewater.

discover

發(fā)現(xiàn)從沒被發(fā)現(xiàn)的事物

find

找到本來就存在的事物dis+coverdiscoverre+usereuse否定重復(fù)Post-readingIfwewanttousetheseawater,wemust____________(拿走)thesaltfromtheseawater.Howcanwe_________(避免)aseriouswatershortage?Weshould__________(找到)waystoreusewater.Althoughtheworldishungry,itiseven_________(更渴的)While_______(幾乎，差不多)?oftheearthiscoveredwithwater,wearestillshortofdrinkingwater.CompletethesentencestakeawayavoiddiscoverthirstiernearlyPost-readingDiscussDoyouknowanyotherwaysofprotectingandsavingwater?Whatarethey?Writedownthekeyinformation.Post-readingExample:Passlawsagainstwaterpollution.Collectandreusewastewater.…Mydearfriends,Waterisveryimportanttohumanbeings.Let’sdosomethingtoprotectandsaveit.First,___________________________________________.Second,_________________________________________.Third,__________________________________________.Let’stryourbesttosavewaterandourplanet._________WriteaproposalaboutsavingwaterPost-readingMydearfriends,Waterisveryimportanttohumanbeings.Let’sdosomethingtoprotectandsaveit.First,weshouldprotectourwaterresourcesandnotpollutethem.Thegovernmentshouldalsopasslawsagainstthewaterpollution.Second,weshouldsavewaterinourdailylife,turnoffthetapsintime,takeashowerinsteadofabath,andalwaysremembertocollectandreusewater.Third,let’strytosprea