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Unit2SavingtheEarthTopic3Whatcanwedoathometoprotecttheenvironment?SectionDGrammarCompoundSentenceRecyclingcanprotecttheenvironment,__

_____itcansavemoney,too.Somethingswehavedonearegoodfortheearth_________somearebad.Weshoulddoeverythingtoprotectit,___

_____we’llbepunishedandloseourhome.…peopleproducepowerfromcoal,_______itisverydirtyandcausesacidrain.andwhileorbut()

1.Helpotherswheneveryoucan_____you’llmaketheworldanicerplacetolivein.A.orB.andC.butD.while()2.Crosstheroadcarefully

,________you’llkeepyourselfsafe.A.soB.orC.butD.and()3.Hurryup,________you’llbelatefortheconcert.A.orB.soC.butD.and()4.---Tellussom

ethingaboutCanada,OK?---I’msorry.________Jack_______Ihaveeverbeenthere.A.Either,orB.Notonly,butalsoC.Both

,andD.Neither,nor()5.IalwaysenjoyvisitingLondon,______Iwouldn’tliketolivethere.A.becauseB.soC.butD.andChoosethebestanswer

.BDADCFunctionsWouldyouliketobea__________person?First,yououghtto_________theelectricitywhenyouleavearoom.__________saidthandone.Actionspeak

_________thanwords.Thetraincan_________atopspeedof431kmperhour.greenershutoffEasierlouderreach1.Whatarethethree

R’s?2.Whichmeans“makesomethinglessorsmaller”?3.Whatshouldwereduce?4.Whichmeans“useitagain”?5.Whatshouldwereuse?6.Whatsho

uldwedoaboutrecycling?Reduce,reuseandrecycle.Reduce.Weshouldreducethethingswhichpeoplecanuseonlyonce.Reuse.W

eshouldreuseplasticbags.Weshouldcollectwastepaperorsoftdrinkcans,andsortthemsothattheycanberecycled.Canyouanswerthem?•

Throwtherubbishhereandthere.•Don’tspitinapublicplace.•Drawabeautifulpictureonthepublicwalls.•Don’tthrowthingsawayiftheycanbereuse

d.•Gotoschoolbybikeinsteadofbybus.•Collecttherubbishandtrytosortit.•Pourdirtywaterintoriversdirectly.•Turnoffthelightswheny

ougoout.Whichoneisright?Howimportantistheforest?Forestsarethelungsoftheearth.RemovecarbondioxidefromtheairMakeoxygenCutdownBuildhousesPlanttre

esHowdoyouunderstand“Forestsarethelungsoftheearth”?Forestscanremovecarbondioxidefromtheairandmakeoxygen.RetellitWhatdifficu

ltiesdotreeplantersfacewhentheyplanttrees?(1)Theweathermaybeveryhotanddryoritmaybeverycoldandwet.(2)T

hereareoftenmanyinsectsthatbitetheseplantersontheirlegs,arms,andfaceswhiletheywork.(3)Theycarryheavybagsofsmalltrees,andw

orkinginthemountainscanbedangerous.adj.干燥的，雨少的，干性的v.使……干，弄干，擦干Whydotheyplantdifferentkindsoftrees?Theyplantdifferenttypesoftre

essothatbirdsandanimalscanliveintheforests.•Whatwillhappenifwedonotplantnewforests?Theforestswillbecomelessandl

ess.Wecannotbreathewithoutthem.•Wouldyouliketobeatreeplanterwhenyouareolder?Whyorwhynot?…Haveatry1.Answerthefollowingquestionstose

ehowgreenyouare.FindingtheGreenestPerson=2=1=00—4Youhavenotstartedturninggreenyet!5—9Youarepalegreen.10—13Youareme

diumgreen.Tryharder.14—18Youarebrightgreen,butdonotstoptrying.Score:=31、Doyouusuallyrecyclenewspaperorcans?Often.Seldom.Never.2.W

hatdoyouusuallytake?Abath.Ashower.3.Whenyouhaveashortjourney,howdoyouusuallygothere?Walkorrideabike.Gobycar.Goby

bus.4.Whatdoyouusuallydowhenyouseeotherslittering?Stopthem.Pickthelitterup.Donothing.5.Howoftendoyouusepapertowels?Often.Seldom.Never.6.Howoftend

oyoueatfastfood?Often.Seldom.Never.7.Whattypeofbagsdoyouuseforshopping?Basketsorclothbags.Reusedplasticbags.Ne

wplasticbags.8.Howoftendoyouturnoffthelightswhenyouleavearoom?Nearlyalways.Seldom.Never.Welearn:1.Som

ewords:dry2.Somephrases:providesth.todosth.;facedifficulties;eventhough3.Somesentences:(1)Withoutthem,itcannotbreathe.(2)Theyplantdifferenttypesoft

reessothatbirdsandanimalscanliveintheforests.Wecan:1.Usethecompoundsentencecorrectly.2.Realizetheimportanceoftheforest.Summary•Read1a.•Memorizetheuse

fulexpressionsandkeysentenceswhichwelearninthistopic.•FinishSectionDinyourworkbook.•Reviewwhatwelearninthisunit.