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Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.SectionApollutionmanytreescutdownforestsgonewashtheearthaway冲走changeintode

sert转换成，变成沙漠e.g.Alotofrichlandhaschangedintodesertbecausepeoplehavecutdowntoomanytrees.sandstormscomeintobein

gn.沙尘暴Theboyandgirlsaretalkingabout—————.A.differenttypesofsandstormsB.thereasonsforsandstormsC.sand

stormsindifferentcities1bListento1aandchoosethebestanswer.Focusonthemainideaoftheconversationwhenyoulistenforthefirsttime.√Listenan

danswerthequestions1.What’stheweatherliketoday?It’sbad.Thewindissostrong.Andthesandreallyhurtsface.2.Whatcausesthe

sesandstorms?Peoplehavecutdowntoomanytrees.Asaresult,alotofrichlandhaschangedintodesert.3.Dowestillneedtodosome

thingtoprotecttheenvironment?Yes,wedo.Althoughwehavebuilt“TheGreenGreatWall”,westillneedtodosomethingtoprotectt

heenvironment.conj.虽然，尽管，即使n.沙somebody,someone,something,somewhereanybody,anyone,anything,anywherenone,nobody,nothing,nowheree

verybody,everyone,everything,everywhere一般情况下用于肯定句一般情况下用于否定句和疑问句表否定含义可用于各种句式theindefinitepronounandadverb1.

Ihave____totellyou.A.importantsomethingB.somethingimportantB形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后Doyouknow?2.Everybody___

readyforthematch.A.isB.areA不定代词作主语时，谓语动词要用单数。1cRead1aandcompletetrees’functions.A.Treescanstopthewindfromblowingtheearthaway.B.Alotofwatercanbesaved

byforests.C.Theycanalsostopthewaterfromwashingtheearthaway.Tree’sfunctionsK:wind;sand;anythingM:sandstormsJ:cutdown;asaresult;changeintoM:a

ffectJ:stop…from…;blow…awayK:canbesavedJ:wash…awayK:isharmfulto;although;dosomethingActoutthedialoginpairs2Completethesentenceswi

ththecorrectformsofthegivenphrasesinthebox.asaresult,changeinto,dosomething,stop…from,blow…away1.Peoplehavecutdownsuchalargenu

mberoftreesthattheland_____________________desert.2.Therearefewertreesleft,sothewindalways_______theear

th________.3.Airpollutionhasbecomeaseriousproblem,sowemust______________toreduceit.4.weshouldtryourbestto_________people______

__cuttingdownthetrees.5.Inthefuture,humanbeingscanprotectthetreeswell._____________,animalswillliveahappyl

ifeintheforest.haschangedintoblowsawaydosomethingstopfromAsaresult3Doyouknowhowsandstormscomeintobeing?Numberthepicturesan

dtalkaboutthesandstormingroups.()()()()()()415362washtheearthawaymanytreeschangeintodesertforestsgonesandstormscomeintobeing

cutdowntrees4A.Listentothepassageandcirclethephrasesyouhear.•becomeweaker•destroytheenvironment•disappearrapidly•o

ntheearth•enoughbambootoeat4B.Listenagainandfillintheblanks.1.Nowsomekindsofanimalsarebecoming___________________.

2.Someanimalsare_______________dyingoutcompletely.3.Inthepast,pandaslivedaquietlifeandhad______________food.4.Humanshave________

____________theimportanceofprotectinganimals.5.Weshould________________toprotectthem.doourbestindangerofplentyofcometounderstandfewerand

fewer1.Lily,wouldyoulike___________todrink?2.Cindyisverybusynow.Sheneeds_______tohelpher.3.Isthere_______

__wrongwithyourcomputer?4.Jimlookedforhispencil-box____________,buthedidn’tfindit.5.Istayedathomelastweek.Ididn’tgo_

_________.Usesomeone,something,anything,somewhere,anywheretofillintheblanks.somethingsomeoneanythingsomewherea

nywhereWelearn:1.Somewords:sand,although2.Somephrases:changeinto,humanbeing3.Somesentences:(1)Asaresult,alotofrichlandhaschangedintodesert.(2)Treesca

nstopthewindfromblowingtheearthaway.Wecan:1.Usetheindefinitepronounandadverb.2.Talkaboutthesandstormanditsharm.Summary1.R

ead1a.2.Memorizetheusefulexpressionsandkeysentenceswhichwelearntoday.3.FinishSectionAinyourworkbook.4.PreviewSectionB.