人教版选修八课件Unit 2 Cloning Listening&Speaking
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Listening&Speaking
Iscloningcruel?ListenandseewhetheryouagreewithXiaoQingorMary.1.Readthesestatementsbeforelistening.Tickthosethatyouhear.①Cloningwillbringdeadpetstolife.②Therewere627experimentsbeforeDollywassuccessfullyclone
③Cloningmayproducemedicineorevenorgansofahumanbodytocureseriousillnesses.④Dollywas“middle-aged”whenshewasborn.⑤Soyourgrandmotherwouldbeabletostartherlifealloveragainandlivetoanoldage.
2.Listentothetapeagain.Mary’sideasaboutcloningXiaoQing’sideasaboutcloning1crueltoanimals1scientistsaredoingawonderfuljob2makesthemdounnaturalthings2maybringbackextinctanimals3itisa“deadend”3problemsbecauseitisanewscience
Mary’sideasaboutcloningXiaoQing’sideasaboutcloning4clonebornatageof“mother”4scientistsneedencouragement5weakensthespecies5itmayprovidemedicineforillnesses
3.Whoseideasdoyouagreewith?Getreadytohaveaclassdiscussion.Thinkaboutthereasonsforyourpointofview.Useyourownideasaswellasthoseinthetext.Thesewordsandphrasesonpage18maybeusefulforyouduringthediscussion:
That’sagoodidea.Icannotacceptyourargumentbecause…Isupport…because…No,Ican’tagreewith…because…Iagreewith…because….Howcanyoubelievethat?
Yourargumenthasconvincedmebecause…Iwouldliketoagreewithyoubut…Idon’tcareforyourideasbecause…No,thatisnotreasonablebecause….That’sagreatidea!Yourideassoundveryencouragingtome.
ListeningTextISCLONINGCRUEL?XiaoQingandMaryBrownarediscussingwhethercloningiscrueltotheanimals.MB:XiaoQing,doyouthinkcloningiscruel?
XQ:Whatdoyoumeanbythat?Thescientistsaredoingawonderfuljobandsoontheymaybeabletobringbackextinctanimalsoreverpeople’sfavouritepetsbacktolife.MB:Yes,Qing,Iknow.Butdoesn’tthatseemstrangetoyou?Isitworthit?Ittook276experimentsbefore
Dollywassuccessfullycloned.ThinkofallthoselivecellsandeggsthatdiedinorderforDollytobeborn.Idon’tapproveofthat!XQ:ButMary,bereasonable.Isn’titalwayslikethatwithanewscience?Thisisthewayyoulearntodo
thingsbetter.It’sjustthatthisonedealswithlivingthings.MB:Isupposeso—buttheymaketheanimalsdounnaturalthings.Onepoorcowwasmadetogivebirthtoabison.Whatwasthepoorcreaturetothinkwhenissawitsbaby?
XQ:Idon’tquiteunderstandwhysomanypeopleareagainstcloning.Ithinkthescientistsneedalittleencouragement.Theyhavedonesomeamazingthingsandthinkofthebenefits.Producinganimalsthatareanexactcopyoftheoriginalmayhelpmedicalscienceproduce
medicinesorevenorgansforseriousillnesses.MB:Yes,I’veheardallthat.IagreewithitbutIdon’tagreewiththemethods.Idon’tthinkcloningisgoodforanimals.XQ:Whynot?
MB:Well,Ithinkit’sadeadend.Dollythesheepwas“middle-aged”whenshewasbornbecauseherDNAcamefromamiddle-aged“mother”.Cloningyourgrandmotherwouldmeanthenewbabystartedlifeasanoldlady!
XQ:Areyousure?Ineverthoughtofthat!MB:Anditalsoweakensthespecies.Clonesmeanthereislessvarietyinthespeciesandsoillnesseswillbecomemorecommonandtheanimalsmaydieout.
XQ:Ohdear!AndthatwasjustwhatyouandIweretryingtoavoid.IseeIshallhavetolookatthiswholecloningquestingagain!
ListeningonP541).Howwouldyoutreathumanclones?2).Doyouthinktheyshouldhavelegalandpoliticalrights,suchasgettingmarriedorvoting?3).Doyouthinktheyareseparatepeopleorpartoftheoriginaldonor?1.Discussthesequestions.
1.Clarethinkshumancloningwillcomesoon.2.Thecloneisthesameastheoriginaldonor.3.Parentswhoareunabletohavetheirownchildrenmaywanttobuyclonedbabies.2.Tickthecorrectones.
4.Clarebelieveshumancloningwillcauseunexpectedproblems.5.WangQiaothinksitismoraltoclonebabiesforparentswhocannothavechildren.AnswerkeyforExercise3:BCA
ListeningtextISHUMANCLONINGAGOODIDEA?WangQiaoistalkingtoClarePetersabouthumancloning.WQ:Whatdoyouthinkabouthumancloning,Clare?CP:Idon’tknowwhattothink.ButIsupposeit’llcomeoneofthese
days.Ithinktherearemanyproblemsthatnobodyhasthoughtofyet.WQ:Whatdoyoumeanbythat?CP:Well,aclonewillbeanexactcopyoftheoriginaldonor.Right?WQ:Yes,sowhat?CP:Well,what’stherelationship
betweenthecloneandhisoriginaldonor?WQ:Isupposetheymustbelikeoneperson.Thecloneisthesameashisoriginaldonor.CP:Let’ssupposethatyoutakeababytoalaboratorytobecloned.Doesitmatterifthe
laboratoryreturnsyoutherealbabyandonecloneortwoclones?WQ:Yes,itdoes.Buthowcouldthispossiblehappen?CP:Well,thescientistsmaygetconfused.WQ:Mygoodness.Surelytheywouldnoticeifthereisanage-gap
betweenthedonorandtheclone?CP:Maybe.Whatifthedonorandthecloneareverycloseinage?Letussupposetheyarebothbabies.WQ:OK.CP:Let’ssupposethatthelaboratorywantedtousetherealbabytomakemoreclones.Perhaps
theyknowparentswhowouldliketobuyaclonedbaby.Perhapsthisfamilyisunabletohavechildrenoftheirown.Sothelaboratorykeepstherealbabyandsellstheclonesastheygrow.WQ:Butthat’sababyfactory!That’snotmoralatall!
CP:Iknow,andthat’swhyit’simportanttogetourideassortedoutnow.Sowereallyhavetothinkabouttheproblemsofhumancloning.WQ:Yes.NowIseeyourpoint.Weshoulddosomethingaboutthis.Howaboutameeting?Whatdoyouthink?…(fadeout)
ListeningtaskonP57AnswerkeyforExercise1:1.F2.O3.F4.F5.F6.F7.F8.O9.O10.F
Listentothetapeagainandanswerthefollowingquestions.1.WhydoesBillyagreewithcloning?HewantstomakehismotherhappybykeepingherpetdogaliveforeverandhealsowantstotakethechancetoAmericaforholidaywhenthedogisbeingclonedthere.
2.What’sFrank’sattitudetowardscloning?Why?Frankdoesn’tagreewithcloningbecausehethinkscloningisveryexpensiveandithasmanymoralproblems.
3.WhatdoyouthinkBilly’smotherconsidersaboutcloning?Billy’smotherisinfavourofcloning.SheissavingmoneytogotoAmericatohaveherpetdogclonedjustbeforeitdies.4.What’syourownopinionaboutcloning?Variousanswersarepossible.
3.Listenagainandsortouttheargumentsforandagainstcloningpets.ArgumentsforcloningpetsArgumentsagainstcloningpets1.Itismoraltomakemymotherhappy.1.Itisveryexpensivetocloneapet.
ArgumentsforcloningpetsArgumentsagainstcloningpets2.Itcanprovideanexcuseforaholidayabroad.3.MymotherwillneedherpetwhenIamaway.2.Itisselfishbecauseitisanexcuseforaholiday.3.Itisselfishbecauseitmeansthestudentcanstudyabroadwithouthismothercomplaining.
ListeningtaskADISCUSSIONABOUTCLONINGBillyandFrankarehavingadiscussionaboutcloningpets.BILLY:Youknow,Frank,Iagreewithcloning.Mymumhasapetdogandsheisdevotedtoher.Ithinkifanythinghappened
tothispetshewouldbesoupset.Sowewanttokeepmymotherhappybykeepingherpetaliveforever!FRANK:What’sthisallabout?Alittledog!Surelyyoucanmakeyourmotherhappyagaininanotherway!Doessheknowwhat
peopledidbeforecloningwaspossibility?BILLY:Yes,andsheknowsthecloningprocedure.She’sreadabouttheexperimentsinAmerica.Theyofferchancesforpetstoproducetheirownstemcells.Thesestemcellswillproducenewpetsataveryreasonableprice
FRANK:Reasonableprice!Surelyitwillbeveryexpensive.BILLY:Well,mymotherissavingmoneytogotoAmericawiththedogjustbeforeitdies.Ifshegoestothelaboratorywe’llallspendaweekinAmerica.Ifwe’relucky,we’llbeableto
returnafterafewmonthswithanewdog.FRANK:NowIunderstand.YoujustwantaholidaytriptoAmerica,andgettinganewdogisjustanexcuse.BILLY:Yesandwhynot?FRANK:Youareencouragingyour
mothertoloveherdog,soshewillwanttocloneitwhenitgetsold.Thenyouwilltakeadvantageofthattohaveagoodholiday.Don’tyouthinkaboutthemoralproblemsofcloning?BILLY:No,Idon’t.It’sfinebymeifI
canmakemymotherhappyandenjoymyselfaswell.That’smoraltoo!FRANK:YouknowwhattheysayaboutsmalldogsinWesterncountries.Peoplekeepdogsinsteadofhavingarealbaby.Isthatthecasewithyourmother?
BILLY:Certainlynot!Shehasmeafterall.ButIhavetobeawayfromherwhenIstudyabroadformyMaster’sdegree.She’llneedhersmalldogthen!FRANK:Isee.NowIknowwhyIdon’tagreewithcloning.BILLY:NowyouknowwhyIdo.
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