Unit2SavingtheEarthTopic2AlltheseproblemsareveryseriousSectionALearningaims1.Learnsomenewwordsandphrases:sand,sandstorm,desert,although,changeinto,humanbeing,stop...from...2.Learnsomeusefulsentences:(1)Asaresult,alotofrichlandchangedintodesert.(2)Treescanstopthewindfromblowingtheearthaway.3.Knowtheimportanceoftrees.4.Cultivatestudents’awarenessofcaringfornature.Lead-insandstormn.沙暴sandn.沙NewwordsAlotofrichland____________desertbecausepeoplehavecutdowntoomanytrees.changedinto=turninto轉(zhuǎn)換成，變成It’sadesert.

n.沙漠Peopledesertedthehouses.v.廢棄，遺棄NewwordsAsaresult,s_________comeintobeing.andstormsListen,lookandsay.(Kangkang,MariaandJanearetalkinginaroom.Thewindoutsideisblowingstrongly.)Maria:Whatastrongwind!Kangkang:Yes.Butit’sbetterthanthelastfewyears.Thereweresandstormsbefore.WhileIwaswalkingdownthestreet,Icouldn’tseeanything.Thesandreallyhurtmyface.Maria:Whywastheweathersobad?Jane:Peoplecutdowntoomanytrees.Asaresult,alotofrichlandchangedintodesert.Treescanstopthewindfromblowingtheearthaway.Kangkang:Andalotofwatercanbesavedbyforests.Jane:Treescanalsostopthewaterfromwashingtheearthaway.Maria:Cuttingdownthetreesaffectstheweathersomuch.Kangkang:Yes.Itisharmfultohumanbeings,animalsandplants.Althoughthereweresandstormsbefore,nowwehavebuilt“TheGreenGreatWall”.Ourenvironmenthasbecomemuchbetter.→Wecanchange

grapesinto

thewine.Alotofrichlandhaschangedintodesert.→轉(zhuǎn)換成，變成Listento1aandchoosethebestanswer.Theboyandgirlsaretalkingabout_______.differenttypesofsandstormsthereasonsforsandstormssandstormsindifferentcitiesFocusonthemainideaoftheconversationwhenyoulistenforthefirsttime.√thelastfewyearsasaresultblow...awaywash...awaycutdownbeharmfulto=doharmtostop/prevent/keep...fromdoingsthwalkalongthestreetActivity2:單詞閃現(xiàn)，快讀快譯。單詞閃現(xiàn)，快讀快譯。Pre-listening()()()()()()415362washtheearthawaymanytreeschangeintodesertforestsgonesandstormscomeintobeingcutdowntreesDoyouknowhowsandstormscomeintobeing?Listentothetapeandnumberthepictures.DECBAParticipatoryLearningWhile-listeningTheboyandgirlsaretalkingabout_______.differenttypesofsandstormsthereasonsforsandstormssandstormsindifferentcities√Listento1aandchoosethebestanswer.Focusonthemainideaoftheconversationwhenyoulistenforthefirsttime.Task1Readthetapeandfinishthethinkingmap.Treescanstopthewindfromblowingtheearthaway.stopthewaterfromwashingtheearthaway.savealotofwaterWhat’stheweatherliketoday?Whatcausesthesesandstorms?It’sbad.Thewindissostrong.Andthesandreallyhurtspeople'sfaces.Peoplehavecutdowntoomanytrees.Asaresult,alotofrichlandhaschangedintodesert.Listenagainandanswerthequestions.Task2While-listeningListenagainandanswerthequestions.Doweneedtodosomethingtoprotecttheenvironment?

How?Yes,wedo.Althoughthereweresandstrom,

nowwehavebuilt“TheGreenGreatWall”.although=thoughWhile-listeningRetellthetrees`functionstoyourpartneraccordingtothethinkingmap.Youcandoitlikethis:Treescanstop....Treesalsocansave....What`smore,treescanprevent....1.剛才2.變成/轉(zhuǎn)換成3.阻止某人做某事4.對(duì)......有影響5.把......沖掉/洗掉(吹走，帶走）6.許多（謂語v.用復(fù)數(shù)）7.......的數(shù)量（謂語v.用單數(shù)）8.滅絕9.砍倒10.結(jié)果11.對(duì)...有害12.開始存在，產(chǎn)生13.處于(…的)危險(xiǎn)中14.開始/逐漸做某事15.足夠的，大量的1.justnow=amomentago2.change/turn---into---3.stopsb.fromdoingsth..（prevent/keep)4.haveaneffecton=affect5.wash...away(blow/take)6.anumberof+c.n.(pl)7.thenumberof+the+c.n.(pl)8.dieout9.cutdown10.asaresult11.beharmfulto=doharmto12.comeintobeing13.beindanger(of)14.cometodosth.15.plentyofExercisesinclassReadthetapeagainandanswerthefollowingquestions.1.Whatwastheweatherlikebefore?2.Whywastheweathersobad?3.Howdoescuttingdowntreesdoharmtous?4.Howisthesituationnow?Thereweresandstorms.Whenpeoplewerewakingalongthestreet,theycouldn`tseeanything.Peoplecutdowntoomanytrees.Asaresult,alotofrichlandchangedintodesert.Itcanaffecttheweatherandisharmfulto

humanbeings,animalsandplants.Wehavebuilt“TheGreenGreatWall”.Ourenvironmenthasbecomemuchbetter.Workinpairs.Askandanswerthequestions.1.Whatwastheweatherlikebefore?2.Whywastheweathersobad?3.Howdoescuttingdowntreesdoharmtous?4.Howisthesituationnow?SummaryWelearn:1.Somewords:sand,although

2.Somephrases:changeinto,humanbeing

3.Somesentences:

(1)Asaresult,alotofrichlandhaschanged

intodesert.

(2)Treescanstopthewindfromblowingtheearthaway.

Wecan:1.Usetheindefinitepronounandadverb.

2.Talkaboutthesandstormanditsharm.

While-listeningExercisesinclass1.Ourteacherhavetoldus_____thetrees.A.cutoffB.cutdown

C.nottocutoffD.nottocutdown2.____theycanswim,____theynevergoswimmingalone.A.Although,butB.Though,but

C.Although,/D.Because,so3.Thepolicementriedtopreventtrafficaccidents_____happening.A.fromB.inC.toD.with4.Hedidn’tcrosstheroaduntiltheredtrafficlightschanged____greenones.A.toB.intoC.forD.in5._____badweather!Wehavetostayathome.A.WhataB.HowC.HowaD.What6.Iknockedonthedoor,but______answered.A.somebodyB.nobodyC.anybodyD.everybody7.Yourcomputerdoesn’tworknow,isthere_____withit?A.wrongsomethingB.somethingwrongC.wronganythingD.anythingwrong8.-Wouldyouliketohave_____?-No,thankyou.I’vehadenough.A.an