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Unit2SavingtheEarthTopic3Whatcanwedoathometoprotecttheenvironment?SectionDGrammarCompoundSentenceRecyclingcanprotecttheenviro

nment,_______itcansavemoney,too.Somethingswehavedonearegoodfortheearth_________somearebad.Weshoulddoeverythingtoprotectit,________

we’llbepunishedandloseourhome.…peopleproducepowerfromcoal,_______itisverydirtyandcausesacidrain.andwh

ileorbut()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.an

d()4.---TellussomethingaboutCanada,OK?---I’msorry.________Jack_______Ihaveeverbeenthere.A.Either,orB.Notonly,butalsoC.Bo

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

Wouldyouliketobea__________person?First,yououghtto_________theelectricitywhenyouleavearoom.__________saidthandone.Actionspeak_________thanw

ords.Thetraincan_________atopspeedof431kmperhour.greenershutoffEasierlouderreach1.WhatarethethreeR’s?2.Whichmeans“makesometh

inglessorsmaller”?3.Whatshouldwereduce?4.Whichmeans“useitagain”?5.Whatshouldwereuse?6.Whatshouldwedoaboutrecycling?Reduce,reusean

drecycle.Reduce.Weshouldreducethethingswhichpeoplecanuseonlyonce.Reuse.Weshouldreuseplasticbags.Wesho

uldcollectwastepaperorsoftdrinkcans,andsortthemsothattheycanberecycled.Canyouanswerthem?•Throwtherubbishhereandthere.•Don’tspitinapubl

icplace.•Drawabeautifulpictureonthepublicwalls.•Don’tthrowthingsawayiftheycanbereused.•Gotoschoolbybikein

steadofbybus.•Collecttherubbishandtrytosortit.•Pourdirtywaterintoriversdirectly.•Turnoffthelightswhenyoug

oout.Whichoneisright?Howimportantistheforest?Forestsarethelungsoftheearth.RemovecarbondioxidefromtheairMakeoxygenCutdownBuildhousesPlanttreesH

owdoyouunderstand“Forestsarethelungsoftheearth”?Forestscanremovecarbondioxidefromtheairandmakeoxygen.RetellitWhatdifficultiesdot

reeplantersfacewhentheyplanttrees?(1)Theweathermaybeveryhotanddryoritmaybeverycoldandwet.(2)Thereareoftenmanyinsectsthatbitethesep

lantersontheirlegs,arms,andfaceswhiletheywork.(3)Theycarryheavybagsofsmalltrees,andworkinginthemountainscanbeda

ngerous.adj.干燥的，雨少的，干性的v.使……干，弄干，擦干Whydotheyplantdifferentkindsoftrees?Theyplantdifferenttypesoftreessothatbirdsandanimalscanliveintheforests.•Whatwi

llhappenifwedonotplantnewforests?Theforestswillbecomelessandless.Wecannotbreathewithoutthem.•Wouldyouliketobeatreeplanterwhenyouareolder?W

hyorwhynot?…Haveatry1.Answerthefollowingquestionstoseehowgreenyouare.FindingtheGreenestPerson=2=1=00—4Youhavenotstartedtur

ninggreenyet!5—9Youarepalegreen.10—13Youaremediumgreen.Tryharder.14—18Youarebrightgreen,butdonotstoptrying.Score:=31、Doyouusuallyrecyclenewspa

perorcans?Often.Seldom.Never.2.Whatdoyouusuallytake?Abath.Ashower.3.Whenyouhaveashortjourney,howdoyouusuallygothere?Walkorridea

bike.Gobycar.Gobybus.4.Whatdoyouusuallydowhenyouseeotherslittering?Stopthem.Pickthelitterup.Donothing.5.H

owoftendoyouusepapertowels?Often.Seldom.Never.6.Howoftendoyoueatfastfood?Often.Seldom.Never.7.Whattypeofbagsdoyouuseforshopping?Baske

tsorclothbags.Reusedplasticbags.Newplasticbags.8.Howoftendoyouturnoffthelightswhenyouleavearoom?Nearlyalways.Seldom.Never.Welearn:1.Some

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

typesoftreessothatbirdsandanimalscanliveintheforests.Wecan:1.Usethecompoundsentencecorrectly.2.Realizetheimportanceofthefor

est.Summary•Read1a.•Memorizetheusefulexpressionsandkeysentenceswhichwelearninthistopic.•FinishSectionDinyourworkbook.•Reviewwhatwelearnint

hisunit.