Unit 2 Topic 2 Section B 课件 1

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1、Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.SectionB课件1Wordsandphrasesimportantsandpreventhumanbeingcutdown重要的沙子预防人沙漠砍到沙漠沙尘暴虽然转化成结果desertsandstormalthoughchange...intoasaresultLet'slearnsandstormsNumberthepicturesandthentalkaboutthemingroups.()()()()()()Doyouknowhowsandstormsc

2、omeintobeing?415362Lookatthepictures,describethemusingthewordsgiven,manytreesThereweremanytreesinthemountain.cutdowntreesPeoplehavecutdownmanytrees.forestsgoneForestshavegone.washtheearthawayWaterwashedtheearthaway.changeintodesertAlotofrichlandhaschangedintodesert.Sandstormscomeintobeing1

3、.Thereweremanytreesinthemountain.2.Peoplehavecutdownmanytrees.3.Forestshavegone.4.Waterwashedtheearthaway.5.Alotofrichlandhaschangedintodesert.6.Sandstormscomeintobeing.Listento1a,answerthequestions.1.Whatisthesandstormlike?2.Whatcausesthiskindofbadweather?Thewindisblowingstronglywithaloto

4、fsand.Peoplehavecutdowntoomanytrees.Alotofrichlandhaschangedintodesert.（录音p35-1a）Skim1a,answerthequestion.Whataretrees’functions?Treescanstopthewindfromblowingtheearthaway.Alotofwatercanbesavedbyforests.Treescanalsopreventthewaterfromwashingtheearthaway.A.B.C.1.Readafterthetape2.Read1atoge

5、ther.3.FindoutkeypointsTreesareimportanttous,whatcanwedotoprotectthem?Weshould/shouldn’t…Wehadbetter/hadbetternot…Weshouldplantmoretrees.Weshouldn’tcutdownmanytrees.Don’tsmokeintheforest.Don’tmakefireintheforest.Weshouldeliminatepests(消灭害虫).Wehadbettercarefortrees…HaveaquizA:Hi，Ann!B:Hi,Bi

6、ll!A:Whatbad_______!Thereissomuchsandintheair.B:Soitis.Haveyouheardofthesandstorm?A:No,I______.Whatisthat?B:Thereisalotofsandflyingintheairwhenthewindisblowingstrongly,sothatwecannot________anythingclearlyoutside.A:Butwhatcausesthese________?B:Peopledosomethingharmfultodestroytheenvironmen

7、t.Forexample,peoplehave______________toomanytrees.Allforestshave______,sosandstorms______________being.A:Thatistoobad!Ithinkwestillneedtoworkhardtoprotectour_________.B:Iagreewithyou.weatherhaven’tseesandstormscutdowngonecomeintotreesWearetrees.Wearevery__1__t