国际交流英语视听说第4册unit2

Unit2ProtectingOurPlanetBook4ExampleAnswersThebiggestthreattobigcatsisprobablyhunting.Peoplewanttheirskins,orinsomecases,theymightthinkthebigcatsareathreattopeopleortodomesticanimals.Habitatlosscouldbeanotherfactorthatisendangeringbigcats.1.Lionsandothertypesofbigcatsaredyingatarapidrate.Whatdoyouthinkisthebiggestthreattotheseanimals?ProtectingOurPlanetExampleAnswersIfaplantspeciesbecomesextinct,thenanyinsectspeciesoranimalthatdependsonitcouldgowithoutfoodandshelter.Inaddition,plantsareimportanttothesoilandtheair,solosingaplantspeciescouldhaveseveralnegativeeffectsontheenvironment.2.Ifaplantspeciesbecomesextinct,whateffectdoesthishaveontheenvironment?ProtectingOurPlanetExampleAnswersTropicalpalmshavethegreatestpercentageofspeciesindanger,whilelobsters,ontheotherhand,havethesmallestpercentageandnumberofspeciesindanger.Therefore,tropicalpalmsarethemostthreatenedandlobstersaretheleastthreatened.Whichgroupisthemostthreatened?Whichistheleast?ProtectingOurPlanetExampleAnswersAllofthecategoriesofspeciesarecommoninChinaexceptfortropicalpalms,whichcanbeonlyseeninseveralprovinces.CoralreefsusedtobecommonintheoceansaroundChina,butamajorityofthereefshavebeendestroyedduetoover-fishingandpollution.2.WhichcategoriesofspeciesarecommoninChina?ProtectingOurPlanetAnalyticalListeningUnit2ProtectingOurPlanetListening1ExampleAnswers1.Theduskyseasidesparrowisnowextinct.Whatkindofhabitatdoyouthinkthisbirdlivedin?Thebirdissittingonabranch,soitmusthavelivedinplaceswithtrees.SouthernFloridaisalsoawarmplacewithalotofwetlands.Listening1ExampleAnswers2.Whatdoyouthinkaresomepossiblecausesforitsextinction?Thebirdmayhavebecomeextinctbecauseofhabitatloss,environmentalpollution,ordisease.(It’sasmallbird,sopeoplewouldn’twanttohuntit.)A|Note-Taking.Listentotheguidedtourandcompletethenotes.Besuretousekeywords,abbreviations,andsymbols.Noticetheindentations.AGuidedTourListening1EndangeredSpeciesAct(ESA)—1973Protectsanimalsandtheir________________Ex.:_________________________________Ongoingconflictbetween___________and_________Ex.:_______________________________ESAprotects____________;ranchersfeellawviolates___________habitatssteelheadtroutinWashingtonstatelandownersgovernmentgraywolfinWyomingandIdaholandtheirrightsA|Note-Taking.Listening1EndangeredSpeciesTodaySituationtodayis___________thanin19731.____________specieslistedas____________or____________2.Since1973only______speciesremovedfromlist3.BUTonly_______removedbecausetheyrecovered;______becameextinct,otherslistedbymistake4._______morespeciesmaysoonbeaddedtolistworse>1,300endangeredthreatened39149300A|Note-Taking.Listening1ConclusionEvenw/ESAinplace,___________________________________________________________________notmakingmuch

progressListening1B|ListeningforMainIdeas.Readthequestionsandanswerchoices.Thenlistenagainandchoosethecorrectanswers.UseyournotesfromexerciseAtohelpyou.1.Whatisthemaintopicofthetalk?a.Whytheduskyseasidesparrowbecameextinct.b.Thedifficultiesofprotectingbothanimalsandtheirhabitats.c.ReasonsthattheEndangeredSpeciesActisn’tworking.bListening1B|ListeningforMainIdeas.Readthequestionsandanswerchoices.Thenlistenagainandchoosethecorrectanswers.UseyournotesfromexerciseAtohelpyou.2.WhatdoestheEndangeredSpeciesActprotect?a.Endangeredanimalsandtheirhabitats.b.Endangeredanimalsbutnottheirhabitats.c.Animalhabitatsbutnotendangeredanimals.aListening1B|ListeningforMainIdeas.Readthequestionsandanswerchoices.Thenlistenagainandchoosethecorrectanswers.UseyournotesfromexerciseAtohelpyou.3.WhathashappenedsincethepassageoftheEndangeredSpeciesAct?a.Thenumberofspeciesthatareendangeredhasgreatlydecreased.b.Thenumberofspeciesthatareendangeredhasincreasedalot.c.Thenumberofspeciesthatareendangeredhasnotchangedmuch.cPriorKnowledge.Discussthequestionswithapartner.Listening21.Ducks,quail,turkeys,andpheasantsarepopularbirdstohunt.Elkanddeerarepopularfour-leggedanimalstohunt.Whatotheranimalsdoyouknowthatarehunted?2.Haveyouevergonehunting?Ifyouhave,didyoulikeit?Ifyouhaven’t,wouldyouliketotryit?Whyorwhynot?Listening2ExampleAnswersDependingontheplace,peoplealsohuntrabbits,squirrels,bears,moose,lions,elephants,alligators,andotheranimals.1.Ducks,quail,turkeys,andpheasantsarepopularbirdstohunt.Elkanddeerarepopularfour-leggedanimalstohunt.Whatotheranimalsdoyouknowthatarehunted?Listening2ExampleAnswer1Yes,Ihave.IlikeditbecauseIenjoybeingoutdoors,anditwasexcitingtolookforananimal,evenifIdidn’tkillone.2.Haveyouevergonehunting?Ifyouhave,didyoulikeit?Ifyouhaven’t,wouldyouliketotryit?Whyorwhynot?Listening2ExampleAnswer2Yes,Ihave.Ididn’tlikeitbecausetherealityofkillingandprocessingananimalforfoodwasunpleasant.2.Haveyouevergonehunting?Ifyouhave,didyoulikeit?Ifyouhaven’t,wouldyouliketotryit?Whyorwhynot?Listening2ExampleAnswer3No,Ihaven’t.IwouldliketogobecauseIwanttolearnhowtouseagunintherightway.2.Haveyouevergonehunting?Ifyouhave,didyoulikeit?Ifyouhaven’t,wouldyouliketotryit?Whyorwhynot?Listening2ExampleAnswer4No,Ihaven’t.Iwouldn’tliketogobecauseIthinkkillinganimalsisverycruel.Besides,IappreciateanimalsandIdon’teatthem.2.Haveyouevergonehunting?Ifyouhave,didyoulikeit?Ifyouhaven’t,wouldyouliketotryit?Whyorwhynot?Listening2ExampleAnswersThewoman(Yumi)speaksinfavorofhunting.Theman(Raoul)speaksagainsthunting.B|Note-Taking.Listenagain.Takenotesonthespeakers’argumentsforandagainsthunting.Alsotakenotesontheirresponsestoeachother’sarguments.Listening2Listening2ExampleAnswersYumi’sArgumentsforHunting•Huntinghelpscontrolanimalpops.•Hunters’licensefeeshelppayforanimalconservation.Raoul’sArgumentsagainstHunting•Somehuntersareirresponsible.•Huntingiscruelandcausespainandsufferingtoanimals.•Thereisalotofillegalhunting.Tobecontinued>>>Listening2ExampleAnswers(Continued)Yumi’sResponsestoRaoul•Naturalpredatorsalsoeatcowsandsheep.•Cowsalsosufferwhentheyarekilledforfood.•Mosthuntersarelawabidingandkillonlywhattheycaneat.Raoul’sResponsestoYumi•Touristscanalsopaytoraisemoneyforanimalconservation.ExampleAnswer1Idothinkthathuntingshouldbeallowedinourarea.Wewouldneedtocreaterulestoprohibitthehuntingofendangeredspecies,andalsotorequirehunterstoonlykilltheanimalsoftherightageandsex,andonlyattherighttimeoftheyear.Listening21.Doyouthinkthathuntingshouldbeallowedinyourarea?Ifyes,whathuntingruleswouldyoumake?Ifno,whynot?Listening21.Doyouthinkthathuntingshouldbeallowedinyourarea?Ifyes,whathuntingruleswouldyoumake?Ifno,whynot?ExampleAnswer2Idon’tthinkthathuntingshouldbeallowedinourareabecausethereisverylittlewildlifeleft,andveryfewwildareaswhereanimalscanlive.Huntingwouldjustbemorepressureonthesurvivalofanimalspecies.ExampleAnswer1Idothinkthegovernmentshouldtrytoconvincemoreyoungpeopletotakeuphuntingbecausebeingoutdoorsteachespeopleaboutnature.Ifpeoplelovenature,theywillbemorewillingtoprotectit.Huntingcanalsobeagoodactivityforfamiliestodotogether.Listening22.Somegroupsbelievethatteachingchildrenandteenagersabouthuntingwillmakethemresponsiblehuntersasadults.Shouldthegovernmenttrytoconvincemoreyoungpeopletotakeuphunting?Whyorwhynot?Listening22.Somegroupsbelievethatteachingchildrenandteenagersabouthuntingwillmakethemresponsiblehuntersasadults.Shouldthegovernmenttrytoconvincemoreyoungpeopletotakeuphunting?Whyorwhynot?ExampleAnswer2Idon’tthinkthegovernmentshouldtrytoconvincemoreyoungpeopletotakeuphuntingbecausehuntingisapracticethatisn’tanecessityinthemodernworld.Peopleshouldeatfoodraisedbyfarmersinsustainableways.Thereisnoneedforustodisturbwildanimalsinhabitatsthataregettingsmallereveryyear.LanguageFunctionIntroducingExamplesWeusemanyexpressionstointroduceexamples.Mostofthemareplaceddirectlybeforetheexample.I’vevisitedmanynationalparks,forexample,ShenandoahandYosemite.There’sawidevarietyofanimalsthere—for

instance,bison(美洲野牛)andwolves.Alligatorsthriveinhabitatssuch

astheEverglades.TheEvergladesishometomanyspeciesofwildlife,includingtheFloridapanther(黑豹)andtheAmericanalligator.Tobecontinued>>>LanguageFunctionIntroducingExamples(Continued)Afewexpressionsmaybeplacedaftertheexamples,especiallyincasualspeeches.I’vevisitedmanynationalparks—ShenandoahandYosemite,forexample.There’sawidevarietyofanimalsthere—bisonandwolves,forinstance.B|

UsingaDictionary.Somewordshavemorethanonemeaning.Withyourpartner,readthesesentencesfromthevideo.Noticetheunderlinedwordsandphrases.Thenreadthedefinitions.Therearetwodefinitionsforeachwordorphrase.Choosethedefinitionthatfitsthesentencefromthevideo.Useyourdictionarytohelpyou.Before

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1.Theonlychancethemuggerhasinthewildishere,inSriLanka.a.acriminalwhorobsothersinpublicb.acrocodileofsouthernAsiabB|

UsingaDictionary.Before

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2.Iftheydieouthere,they’reprobablygoneforgood.a.forever,permanentlyb.sothatthingswillbebetter3.Thewinnergetstheprize—hispickofthefemales.a.asharp,pointedtoolb.choice4.Muggershavebeenactingoutthisritualformorethan100millionyears.a.aprocedureforareligiousceremonyb.anactivityorbehaviorthathappensoftenabbA|

Note-Taking.Watchthefirstpartofthevideo.Completethenoteswithwordsfromthebox.WhileViewingTobecontinued>>>1.Increased__________populationsless__________foranimals2.India:bigproblemfor___________3.RomWhitakerwantstosavethe___________crocodile.4.Indianwetlandsarenow____________andfarms.humanhabitatscrocodilesmuggerricefieldsA|

Note-Taking.Watchthefirstpartofthevideo.Completethenoteswithwordsfromthebox.Tobecontinued>>>5.MadrasCrocodileBank—world’slargest_____________pop.ofmuggers6.Can’tletthemgo—noplaceforthemin_____________captiveIndiaWhileViewingB|

Note-Taking.SomeNote-Taking.Watchthenextpartofthevideo.Completethenoteswithoneortwowordsyouhear.thelowlandsafew30RomWhitakerwildWhileViewingA|

Collaboration.Withyourpartner,thinkoffourquestionsyouwouldliketoaskRomWhitakeraboutthefutureofthemuggercrocodiles.After

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ExampleAnswers1.Whydon’twildmuggersliveinIndiaanymore?2.HowdothemuggerssurviveinSriLanka?3.Whyisthemuggers’survivalimportant?4.Isthereanythingpeoplecandotohelpthemuggerssurvive?After

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ExampleAnswers1.Q:Whydon’twildmuggersliveinIndiaanymore?A:Thehabitatisgonenow.India’spopulationhasgrown,andtheformercrocodilehabitatisnowfarmsandricefields.2.Q:HowdothemuggerssurviveinSriLanka?A:Longago,farmersherecreatedlakesandpondsintheforesttoirrigatetheircrops.Thecrocodilescanusethoseashabitatinsteadofnaturalwetlands.After

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Tobecontinued>>>ExampleAnswers(continued)3.Q:Whyisthemuggers’survivalimportant?A:Likeanylarge,predatoryanimal,themuggerplaysanimportantroleintheecosystembypreventingtheoverpopulationofotheranimalspecies.4.Q:Isthereanythingpeoplecandotohelpthemuggerssurvive?A:Peoplecaneducatethemselvesaboutanimalspeciessuchasthisone.Eventhoughthey’renotcute,crocodilesareimportanttolifeonEarth.After

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A|EvaluatingArguments.Readthearguments.Aretheseargumentsfororagainstkeepinganimalsinzoos?WriteFiftheargumentisforzoosorAiftheargumentisagainstzoos.ParticipatingaDebate___1.Animalsdonothaverights,soitisacceptableforpeopletokeeptheminzoos.___2.Zooseducatepeopleabouthowtoprotectendangeredspecies.___3.Inmanyzoos,animalsarekeptinsmallcagesandcannotmovearound.___4.Itcostsalotofmoneytokeepanimalsinzoos.FFAAParticipatingaDebate___5.Itisfuntoseeinterestingandunusualanimalsinzoos.___6.Zoosprotectanimalsthatarehuntedillegally,suchasrhinos(犀牛)andelephants.___7.Peoplecanbeeducatedaboutanimalswithoutkeepinganimalsinzoos.___8.Theartificialenvironmentofazooisverystressfulformanyanimals.Theyoftenstopeating.A|EvaluatingArguments.Readthearguments.Aretheseargumentsfororagainstkeepinganimalsinzoos?WriteFiftheargumentisforzoosorAiftheargumentisagainstzoos.FFAAA|

Readthestatements.Thenlistentoaconversationaboutsavingthewhalesandcheck(✔)TfortrueorFforfalse.Listening11.Mostspeciesofthebaleenwhalesarenowendangered.2.Anumberofcountriescontinuewithcommercialwhalingsimplybecausethereisnopolicyagainstit.3.Californiagraywhalesarenowextinct.4.Accordingtotheconversation,wecanhelpbydonatingmoneytotheconservationorganizations.TF☐☐☐☐☐☐☐☐Listening1AnswerKeys1.T2.F(Theyhavechosentoviolatetheruleandcontinuetokillwhales.)3.F(GraywhaleswereremovedfromtheEndangeredSpeciesList.)4.F(Wecanhelpbylearningaboutwhalesandtheirhabitats,donatingourtimetoconservationorganizations,andalteringourbehaviortocreateaslittlewasteaspossible.)B|Readthequestions.Thenlistenagainandcompletethesentenceswithwhatyouhear.Listening11.Theendangeredstatusofwhalesistheresultof____________________inthe19thand20thcenturies,whenwhaleswereexploitedfor_________________.2.Today,threatstowhalesinclude___________,_____________________and___________.3.Whalepopulationsmayrecoverasthe_________________areworking.commercialwhalingmeatandoilhuntinghabitatdestructionpollutionconservationeffortsTobecontinued>>>B|Readthequestions.Thenlistenagainandcompletethesentenceswit