Unit-2--Cloning-Reading

CloningUnit2Acloneisananimalorplantproducednaturallyorartificiallyfromthecellsofanotheranimalorplantandisexactlythesameasit.Cloningisawayofmakinganexactcopyofanotheranimalorplant.TheclonehasthesameDNAastheparent.What’scloning?SoundsReasonable?Inpairs,lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Thinkabouthowtheydiffer.QuizDollythesheepAstrawberryplantNaturalcloneMan-madecloneAstrawberryplantThenewplantsthatgrowfromtherunners（蔓藤植物）areexactcopiesoftheoriginalplant.TwinsTheyarebornnaturallyandidenticalinsexandappearance.Naturalcloneisonethatoccursinnaturewithouthumanhelp.Man-madecloneisonethatisproducedthroughhumanintervention(介入).CloneCanyoutellthedifferencebetweennaturalcloneandman-madeclone?Inpairsdiscusswhatyouunderstandaboutcloning.Thenlistthequestionsyouwanttofindout.Shareyourlistswithoneanother.Pre-reading1.Howisacloneproduced？Thecloningofplantsissimpleandrelativelyeasy.Itcanbedonebytakingcuttings(man-madecloning)orlettingtheplantproduceitsownrunners(naturalcloning).Thecloningofanimalsismorecomplicated.Itwasnotachieveduntil1996andisfullyexplainedinthefirstreading.2.Whatbenefitscanhumansgainfromcloning？Medicalcloningcanhelpcureseriousillnessesthatruinone’squalityoflife(suchasParkinson’sdiseaseorAlzheimer’sdisease).Itcanhelpinfertilepeoplehavebabies.3.Whatproblemsmayarisewhenhumansarecloned?•Peoplemaywanttoclonethemselvessotheycanliveforever.•Peoplemaywanttoclonedeadchildren.•Peoplemaywanttoclonetheirfavouritepets.1.Whatisthemaintopic?A.Cloning.B.Dollythesheep.C.Itwillleadustosomeplaces.2.Whatisthewritingstyle?A.Expositive(说明性的).B.Descriptive.C.Argumentative(议论性的).AAThemainideaofthetextis______A.animalcloningisveryvaluableandcanbenefittheworld.B.animalcloningcouldbemisusedbybadpeoplesoitmustbeforbidden.C.animalcloningiswelldevelopedbecauseDollythesheepwasborn.D.animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.DSkimmingforgeneralideaPara1A.TheproblemsofDollyPara2B.ThetwomajorusesofcloningPara3C.TheattitudestowardscloningPara4D.ThedefinitionofcloningPara5E.TheeffectofcloninginsocietySkimming:matchthemainideawitheachparagraphScanningforspecificinformation1.Fromthefirstparagraphitcanbeinferredthat______.A.cloningisaman–madetechnologyB.cloningalwaysexistsaroundusC.cloningisverystrangetohumanbeingsD.cloningisonlyconductedinlaboratoriesChoosethebestanswer.2.Itcanbeinferredfromthepassagethataclonedanimal_____.A.usuallylivesaslongastheoriginaloneB.usuallyliveslongerthantheoriginaloneC.usuallydiesearlierthantheoriginaloneD.isusuallyashealthyastheoriginaloneC3.Whichofthefollowingisnotanadvantageofcloning?A.Cloningcanbeusedformedicalpurposes.B.Largequantitiesoffoodcanbeproducedbycloning.C.Cloningcanhelpkeepanimalsfrombecomingextinct.D.Famouspersonswhohavepassedawaycanbecloned.D4.Wecaninferfromthelastthreeparagraphsthat_____.A.thenormaldevelopmentofDollyhadnoeffectonthecloningofotherspecies.B.Dolly’sseriousdiseaseandfinaldeathdisturbedthewholeworld.C.Dollysuccessfullyclonedanewlambwiththehelpofcloningscientists.D.therewereargumentsaboutanimalcloningandconcernsaboutthefutureofcloning.DIthappensbothin________andin_______.Theycanbeclonedby__________and________.plantsanimalsthemselveshumansNaturalcloneMan-madeclonePara1:ThedefinitionofcloningCarefulreading1.Howmanymajorusesdocloninghave?Firstly,…commercial…Secondly,…research…2.Howmanyfemalesheepparticipateinthecloningofanewsheep?3.WhenwasthecloningofDollythesheepborn?3Para2:Themajorusesandproceduresofcloning1996AboutDollythesheepEncouragingnews:Dollydeveloped__________.Disturbingnews:normallyDollylivedforsixandahalfyears,halfthelengthofthelifeoftheoriginalone.Para3:TheproblemsofDollyTheword“controversial”inPara4probablymeans________.A.complicatedB.arguableC.importantPara4:TheimpactofDollyBTrueorfalse:1.PeoplefearedthatClonedHitlerswoulddoharmtotheworld.2.Alltheresearchintohumanbeingswillbeforbidden.3.Somecountrieswillusecloninginawiseway.Para5:People’sreactiontocloningManygovernmentsforbaderesearchintohumanbeings.TTFFurtherunderstandingtheauthordoesnotstateanypersonalopinionaboutcloning.A.Objective(befair)B.Negative(beagainstit)C.Positive(beinfavourofit)Thewriter’sattitudetowardscloningBecause_________________________________________________________________课堂知识巩固Ⅲ.课文语法填空Cloningisawayof1.(make)anexactcopyofanotheranimalandplant.2.hastwomajoruses.Oneis3.gardenersuseittoproducecommercialquantitiesofplants.The4.isthatitisvaluableforresearchonnewspeciesandformedicalresearchonanimals.5._________，theprocessofcloningisdifficulttoundertake.makingItthatotherHowever课堂知识巩固Manyattemptstoclonemammalsfailed.Thefirstsuccessfulclone，Dollythesheep，madethewhole6.(science)worldfollowitsprocess，thoughithad7.problemsthanthenormalsheep.Ontheotherhand，Dolly'sappearance8.(raise)astormofobjectionsandhadagreatimpact9.themediaandpublicimagination.Differentpeoplehavedifferentopinionsonit.However，scientistsstillwonderwhethercloningwillhelp10.harmusandwhereitisleadingus.scientificmoreraisedonorConclusionAdvantage(goodpoints)Disadvantage(badpoints)Itcanm