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ReadingTwinsTheyarebornnaturallyandidenticalinsexandappearance.AstrawberryplantThenewplantsthatgrowfromtherunnersareexactcopiesoftheoriginalplant.一株草莓依靠它沿地“爬走”的匍匐茎,一年内就能长出数百株草莓苗。富贵竹插枝即活Thegardenershouldcuttheplant,thenthecuttingproduceanothernewplant.1996cloningsheeps2001cloningcattle我国成功繁殖克隆兔体形要比普通兔大许多2002年5月中旬成功地繁殖了一只胚胎细胞克隆兔。2002cloningcats2002年4月十六日美国第一头克隆牛“艾米”产下牛犊喜作妈咪。2005cloningdogsInpairsdiscusswhatyouunderstandaboutcloning.Thenlistthequestionsyouwanttofindout.Shareyourlistswithoneanother.Pre-reading1.Whatisaclone?Acloneisananimaloraplantproducednaturallyorartificiallyfromthecellsofanotheranimalorplantandisexactlythesameasit.2.Howisacloneproduced？Thecloningofplantsissimpleandrelativelyeasy.Itcanbedonebytakingcuttings(man-madecloning)orlettingtheproduceitsownrunners(naturalcloning).Thecloningofanimalsismorecomplicated.Itwasnotachieveduntil1996andisfullyexplainedinthefirstreading.3.Whatbenefitscanhumansgainfromcloning？Medicalcloningcanhelpcureseriousillnessesthatruinone’squalityoflife(suchasParkinson’sdiseaseorAlzheimer’sdisease).Itcanhelpinfertilepeoplehavebabies.4.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).AALearningtips:Thepassageiswrittenintheexpositivestyle.Thatistosaythetextisinthethirdpersonandinfactualandformallanguage.Itgivesdifferentpointsofviewanddoesnottrytopersuadethereadertomakeuphis/herownmind.3.Dollythesheep_____.A.lookedexactlylikethesheepthatprovidestheegg.B.wastheexactcopyofthesheepthatprovidesthenucleus.C.lookedlikethesheepthatgavebirthtoit.D.hadthecharacteristicsofallthreesheep.B4.Itcanbeinferredfromthepassagethataclonedanimal_____.A.usuallylivesaslongastheoriginaloneB.usuallyliveslongerthantheoriginaloneC.usuallydiesearlierthantheoriginaloneD.isusuallyashealthyastheoriginaloneC5.Whichofthefollowingisnotanadvantageofcloning?A.Cloningcanbeusedformedicalpurposes.B.Largequantitiesoffoodcanbeproducedbycloning.C.Cloningcanhelpkeepanimalsfrombecomingextinct.D.Famouspersonswhohavepassedawaycanbecloned.D6.Whichofthefollowingiswrong?A.Clonedpeoplewouldliveforever.B.Clonedpeoplemaybekilledatwillformedicalaid.C.Awomanwouldhavedifficultyrecognizingherrealhusband.D.Menwilldieoutbecauseawomancangivebirthtoababywithoutahusband.D7.WhichstatementisNOTtrue?A.Cloningissomethingthathasbeendevelopedquiterecently.B.Twinsthatlookexactlythesameareoriginallyfromthesameegg.C.Cloningisusedbygardenerstomakemoremoney.D.Animalcloningismuchmoredifficultthanplantcloning.A8.ThecloningofDollythesheepsucceededbecause_____.A.itseasiertocloneasheepthanotheranimalsB.thescientistsweredeterminedandworkedhardwithpatienceC.thescientistswererewardedandgotlotsofmoneyD.manyotherattemptstoclonemammalsfailedB9.Thelambisthecloneofthecellfromsheepbecause_____.A.itprovidestheeggcellB.itgivesbirthtothelambC.itprovidesthenucleusD.itisafemalesheep10.Thesheepthatdonatedthesomaticcellmostprobablylived____years.A.3B.6C.9D.12CD11.Themainideaofthetextis______A.animalcloningisveryvaluableandcanbenefittheworld.B.animalcloningcouldbemisusedbybadpeoplesoitmustbeforbidden.C.animalcloningiswelldevelopedbecauseDollythesheepwasborn.D.animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.D12.WhichofthefollowisNOTaproblemordangerofcloningmentionedinthetext?A.Evilleadersmaywanttoclonethemselves.B.Animalclonesmaydeveloptheillnessofolderanimalsandmaydieyoungerthanthedonoranimals.C.Therearemoralobjectionstocloninghumanbeings.D.Toomuchcloningmayleadtothedestructionofthebalanceofnature.D13.Wecaninferfromthelastthreeparagraphsthat_____.A.thenormaldevelopmentofDollyhadnoeffectonthecloningofotherspecies.B.Dolly’sseriousdiseaseandfinaldeathdisturbedthewholeworld.C.Dollysuccessfullyclonedanewlambwiththehelpofcloningscientists.D.therewereargumentsaboutanimalcloningandconcernsaboutthefutureofcloning.DCarefulreadingThemainideaofeachparagraph.1.Cloningis________________________________________________________2.Cloninghas____________uses.3.The_________ofDolly.4.The________ofclonginginsociety.5.Theattitudestowardscloning.awayofmakinganexactcopyofanotheranimalandplant.problemstwomajoreffectIthappensbothin________andin_______.Theycanbeclonedby__________and________.plantsanimalsthemselveshumansNaturalcloneMan-madeclonePara1:Thedefinitionofcloning1.Howmanymajorusesdocloninghave?Firstly,…commercial…Secondly,…research…2.Howmanyfemalesheepparticipateinthecloningofanewsheep?3.WhenwasthecloningofDollythesheepborn?3Para2:Themajorusesandproceduresofcloning1996AboutDollythesheepEncouragingnews:Dollydeveloped__________.Disturbingnews:normallyDollylivedforsixyearsandahalfyears,halfthelengthofthelifeoftheoriginalone.Para3:TheproblemsofDollyTheword“controversial”inPara4probablymeans________.A.complicatedB.arguableC.importantPara4:TheimpactofDollyBTrueorfalse:1.PeoplefearedthatClonedHitlerswoulddohar