九年级英语上册-Unit-2-Saving-the-earth-Topic-2-All-these-

Unit2SavingtheEarth

1/29Topic2

Alltheseproblemsareveryserious.

SectionB课件1

2/29Wordsandphrases3/29importantsandpreventhumanbeingcutdown主要沙子预防人沙漠砍到

4/29沙漠沙尘暴即使转化成结果oasaresult

5/29Let'slearn6/297/29sandstorms8/29Numberthepicturesandthentalkaboutthemingroups.()()()()()()Doyouknowhowsandstormscomeintobeing?

4153629/29Lookatthepictures,describethemusingthewordsgiven,

manytreesThereweremanytreesinthemountain.10/29

cutdowntreesPeoplehavecutdownmanytrees.11/29

forestsgoneForestshavegone.12/29

washtheearthawayWaterwashedtheearthaway.13/29

changeintodesertAlotofrichlandhaschangedintodesert.14/29

Sandstormscomeintobeing15/291.Thereweremanytreesinthemountain.2.Peoplehavecutdownmanytrees.3.Forestshavegone.4.Waterwashedtheearthaway.5.Alotofrichlandhaschangedintodesert.6.Sandstormscomeintobeing.16/29Listento1a,answerthequestions.1.Whatisthesandstormlike?2.Whatcausesthiskindofbadweather?Thewindisblowingstronglywithalotofsand.Peoplehavecutdowntoomanytrees.Alotofrichlandhaschangedintodesert.（录音p35-1a）17/29Skim1a,answerthequestion.Whataretrees’functions?Treescanstopthewindfromblowingtheearthaway.Alotofwatercanbesavedbyforests.Treescanalsopreventthewaterfromwashingtheearthaway.A.B.C.18/291.Readafterthetape2.Read1a

together.

3.Findoutkeypoints

19/29Treesareimportanttous,whatcanwedotoprotectthem?

Weshould/shouldn’t…Wehadbetter/hadbetternot…20/29Weshouldplantmoretrees.Weshouldn’tcutdownmanytrees.Don’tsmokeintheforest.Don’tmakefireintheforest.Weshouldeliminatepests(毁灭害虫).Wehadbettercarefortrees…21/29Haveaquiz22/29A:Hi，Ann!B:Hi,Bill!A:Whatbad_______!Thereissomuchsandintheair.B:Soitis.Haveyouheardofthesandstorm?A:No,I______.Whatisthat?B:Thereisalotofsandflyingintheairwhenthewindisblowingstrongly,sothatwecannot________anythingclearlyoutside.A:Butwhatcausesthese________?B:Peopledosomethingharmfultodestroytheenvironment.Forexample,peoplehave______________toomanytrees.Allforestshave______,sosandstorms______________being.A:Thatistoobad!Ithinkwestillneedtoworkhardtoprotectour_________.B:Iagreewithyou.weatherhaven’tseesandstormscutdowngonecomeintotrees23/29Wearetrees.Wearevery__1__toyou.Wecanhelp___2__thewind__3___blowingtheearthawayandstopthesandfrommovingtowardstherichland.Wealso__4__waterfromrunningaway.Eachdaywereleaseoxygen（释放氧气）andremoveharmfulgassothatyouhavepure(纯净）air.Wealsogiveallkinds___5____fruits,nutsaswellaswoodtoyou.Wearenowin___6____becauseofyou.Youareburningand__7_____downmanytrees,butyouarenotplantingenoughones.Youmust___8___yourbadpractices（行为）.Otherwise（不然）alotof___9___landwillchangeintodesert.Rememberthatweareyourbest___10___.()1.A.usefulB.difficultC.important()2.A.preventB.stoppedC.protect()3.A.fromB.toC.of()4.A.savingB.saveC.saved()5.A.ofB.inC.from()6.A.needB.wantC.danger()7.A.puttingB.cuttingC.turning()8.A.stopB.tostopC.stopped()9.A.poorB.richC.fresh()10.A.friendsB.classmatesC.friend24/29Summary25/291.Thewindisblowingstronglywithlotsofsand.2.Peoplehavecutdowntoomanytrees.3.Alotofrichlandhaschangedintodes