选修九同步课件u4p4listeningexercise

Unit4ExploringplantsListentothetext.UNUSUALPLANTSListentoMark(M),Gordon(G)andAndrea(A)tellingtheirclassandtheirteacher(TH)aboutsomeplants.Listenagainandfillintheblanks.TH:TodayMark,GordonandAndreaaregoingtotellusaboutsome_______plants.Mark,doyouwanttogofirst?M:Sure.Today,Iwantto_________aninsect-eatingplantcalledapitcherplant.unusualtalkaboutHere’sa_____ofit.Lookatthisparthere.It’s_______likeapitcher.It’sactuallyaleaf___________itlookslikeaflower.It’sreallyclever---theinsects________________thesweetsmellcomingfromwhattheythinkisaflower.Butit’sa_____.photoshapedeventhoughareattractedbytrapOnceaninsectgoesdownintothepitcher,itcan’tgetoutastherearesmallhardhairspointing__________thatpreventitfrom________.Intheend,theinsectfallsdownintoapoolofliquidatthe_______ofthepitcherandgetsdigestedbytheplant.downwardsescapingbottomS1:That’s________!S2:What________plants!TH:Gordon.G:ThesearetheplantsI’mgoingtotalkabout.They’reoftencalled“livingstones”,buteventhoughtheydolook_______likestones,theyareinfactplants.amazingfantasticabitS3:Wow!S4:Howinteresting!G:Their________nameisLithopsandtheycomefromSouthAfricaandNamibia.Thebodyofalithopsisactuallyapairof______thathavebecome________likeastone.Thisisbecausethisplantlivesinvery_____scientificleavesroundedhotanddryplaces.Whentheleavesare_______likethis,notmuchwaterislostfromtheplant.Anotherinterestingthingaboutthese_______plantsisthatthey’rethesamecolourand__________ofthesoilandstonesaroundit.Thismakesthemless________toanimalslookingforfood.shapedstrangeappearanceobviousTH:Thanks,Gordon.Andrea.A:I’mgoingtotellyou______Rafflesiaarnoldii,aplantthathasafloweraboutonemetre____.Infact,it’sthe______flowerintheworld.Rafflesiaarnoldiidoesn’thaveanyleaves,_____or_____.Itdoesn’tneedthemasit’saparasite.Itgetsitsfoodbyaboutwidelargeststemsrootslivingonanotherplant.Youmightthinkthatthisflowershouldsmell__________butitactuallylooksandsmellslikerottingmeat!S2:Oh,yuck!S1:That’s__________!S3:Ithinkit’sfantastic!wonderfuldisgustingA:Metoo._______,it_______insectsthateatdeadanimalsbut_________gettingafeed,theinsects_______itspollenand_______ittootherRafflesias,RafflesiaarnoldiigrowsinthejunglesinIndonesiabutastheforestsarebeing_________,it’sbecomingvery_____.AnywayattractsinsteadofpickupspreadcutdownrareTH:ThanksAndreaandthankseveryone.Thoseplantsarecertainlyfascinating.Listentothetext.THEDESTRUCTIONOFTROPICALRAINFORESTSEdWalker(E)isinterviewingDrAnneButler(A)aboutthedestructionoftropicalrainforests.Listenagainandfillintheblanks.E:Anne,wehearalotthesedaysabouthow_______tropicalrainforestsare____________.A:Yes,that'sright.Rainforestsnow_____only6%oftheearth'slandsurface.Theyusedtocoverabout____,somorethanhalfoftheworld'stropicalrainforestshavequicklydisappearingcover14%been_________,andthat'sinlessthan50years._____150acresofrainforestislosteveryminuteinAsia,Africa,CentralandSouthAmerica.E:That's___________.destroyedOverunbelievableA:Yes,it's___________.Thelast_________rainforestscouldbegoneinlessthan40years.E:Butwhyisthishappening?A:Well,thereare____________reasons.Aspopulationsincrease,peopleneedmorelandto_______.Forestsarecutdowntoplantcropsortostartfarms.frighteningremaininganumberofliveonThewoodissoldforfirewoodorbuildingmaterials,furnitureandpaper,__________.Andtherearealsominingcompanieswhichdestroytheforestsintheirsearch____minerals.E:I________peoplehavetomakealiving.forexampleforsupposeA:Yes,butyouknow,peoplecanmakemoremoneyby__________thingslikefruits,nutsandoils,__________plantsthatcanbeusedinmedicinethanbycuttingdowntheforests.E:Ohreally?Ididn'tknowthat.Now,couldyou______someofthereasonswhyit’snotagoodideatodestroyrainforests?harvestingaswellasoutlineA:Sure.Youmusthaveheardaboutthe____animalandplantlifeintropicalrainforests.Well,thereareabout___millionspeciesofplantsandanimalsintheworld._________halfoftheseliveinthetropicalrainforests.So,destroyingrainforests_______thatthousandsofthesespeciesare_________beforewe’veevenrealizedit.rich10MorethanmeansdyingoutE:I’veheardtoothattherainforestcould_______us_____curesfordiseases.A:Yes,therearecertainlymanynewdrugs_____________discovered.Anotherproblemisthatthe__________offorests______________globalwarming.providewithwaitingtobedestructioncontributestoAlso,rainforests_______alotofrainsothatthere'saconstant_______ofcleanwaterrunningintoriversandlakes.Ifthetreesarecutdown,therainisn'tabsorbedandthereisflooding.E:So,whatcanindividualsdotohelp__________thedestruction?A:That'sagoodquestion...absorbsupplyslowdownListentothetext.ANEXPERIMENTONPLANTSPart1:Listentoateacher(TH)helpingherclasssetupanexperiment.Listenagainandfillintheblanks.TH:OK,everybody,thismorningwe’regoingtodoan___________to_________threeimportantconditionsthatseedsneedinordertostart________.experimentfindoutgrowingThematerialsareallonthebench.Choosesomeone_____yourgrouptogoandgetfourdishesandfour_________cloth,adishofseeds,sometapwater,someboiledwaterandsomecookingoil.Lookatthe___________ontheboard.Let’sreadthroughthem.frompiecesofinstructionsOne:Putthepiecesofclothonthedishesand_____