Unit2PeriodOne1高中英语人教版选修8配套Word版文档

Unit2CloningPeriodOneWarmingUp&Reading(Ⅰ)基础落实Ⅰ.课文理解1．Themainideaofthetextisthat________.A．animalcloningisveryvaluableandcanbenefittheworldB．animalcloningcouldbemisusedbybadpeoplesoitmustbeforbiddenC．animalcloningiswelldevelopedbecauseDollythesheepwasbornD．animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture2．Dollythesheep________.A．lookedexactlylikethesheepthatprovidestheeggB．wastheexactcopyofthesheepthatprovidesthenucleusC．lookedlikethesheepthatgavebirthtoitD．hadthecharacteristicsofallthreesheep3．Thesheepthatdonatedthesomaticcellmostprobablylived________years.A．3B．6C．9D．134．ThecloningofDollythesheepsucceededbecause________.A．it’seasiertocloneasheepthanotheranimalsB．thescientistsweredeterminedandworkedhardwithpatienceC．thescientistswererewardedandgotlotsofmoneyD．manyotherattemptstoclonemammalsfailedⅡ.课文缩写Cloningisawayofmakinganexact1.________ofanotheranimalorplant.Cloninghastwomajoruses.Firstly，gardenersuseittoproduce2.________quantitiesofplants.Secondly，itis3.________forresearch.Cloningplantsis4.________whilecloninganimalsisverycomplicated.Theprocedureisdifficulttoundertake.In1996，scientistssucceededin5.________Dollythesheep.Thescientificworld6.________theprogressofthefirstsuccessfulclone.Thencamethe7.________newsthatDollywasillandthendied.Dolly’sappearance8.________astormofobjections.Governmentsbecamenervousandsomeforbaderesearchintohumancloning.Scientistsstill9.________whethercloningwillhelporharmusandwhereitis10.________us.Ⅲ.用适当的介、副词填空1．Ithappens________plantswhengardenerstakecuttings________growingplantstomakenewones.2．Secondly，itisvaluable________research________newplantspeciesand________medicalresearchonanimals.3．Butatlastthedeterminationandpatienceofthescientistspaid________in1996________abreakthrough—thecloningofDollythesheep.4．Thenucleusisremoved________theeggcell.5．Theembryoisput________femalesheepC，whobecomesthecarrier________theclone.6．Thefactthatsheseemedtodevelop________wasveryencouraging.7．________theotherhand，Dolly’sappearanceraisedastormofobjectionsandhadagreatimpact________themediaandpublicimagination.8．It________openedeverybody’seyes________thepossibilityofusingcloningtocureseriousillnessesandeventoproducehumanbeings.9．Although________presenthumaneggcellsandembryosneeded________cloningresearcharedifficulttoobtain，newspaperswrote________evilleadershopingtoclonethemselvestoattaintheirambitions.10．Somebegantoreformtheirlegalsystemsandforbaderesearch________humancloning，butothercountries________ChinaandtheUK，continuedtoaccumulateevidence________theabundantmedicalaidthatcloningcouldprovide.Ⅳ.完成句子1．Cloningplantsisstraightforward________________________________________________.克隆植物简单，而克隆动物就非常复杂了。2．________________________________________Dollyhadbecomeseriouslyill.接着传来了多莉病重的坏消息。3．CloningscientistswerecastdowntofindthatDolly’sillnesses___________________.研究克隆的科学家们发现多莉得的病更容易发生在年老的羊身上，这让他们很沮丧。4．AltogetherDollylivedsixandahalfyears，_________________________________.多莉总共只存活了六年半，这是它的原型羊寿命的一半。5．However，scientistsstill___________cloningwillhelporharmusand___________.然而，科学家们仍对克隆技术有助于人类还是有害于人类，以及克隆技术将把我们引向何方而感到困惑。Ⅴ.句型转换1．Atthebeginning，hewasagainstmyproposal.However，intheend，hechangedhismind.Atfirsthe________________mysuggestion，butheatlastagreed.2．Latertheylearntthatanearthquakehadtakenplaceinthatarea.Then________________________thatthatareahadbeenhitbyanearthquake.3．Didhisplansucceed?Didhisplan________________？4．Theprofessorsspokeoutsupportingthereform.Theprofessorsspokeout________________________thereform.5．Theydon’tknowifthenewpolicyisintheirfavour.They________________thenewpolicycanbringbenefittothem.能力提升阅读理解Britishscientistshavedonesomethingthat，manypeoplethought，wasimpossible：Theycreatedthefirstcloneofanadultmammal.Theclone，namedDolly，isaseven­month­oldsheep，grownfromacellofanadultfemalesheep.Whatisaclone？Acloneisacopy—ageneticcopy.Genesaretheinstructionsforlife.Theytellacellwhattodoandhowtodoit.Genesmakeeachindividualplantoranimaldifferentandunique.Butaclonehasthesamegenesastheoriginalorganism(生物体)．Cloningisnotnew.Plantshavebeenclonedforcenturies.Newplantsareoftengrownfromcuttingfromanotherplant.Also，plantslikepineapples，strawberriesandcarnations(康乃馨)aresometimescloned.Onebenefitofcloningisthatwecanmakemanycopiesofthebestandhealthiestplants.Ithasbeenmuchmoredifficulttocloneanimals.Frogshavebeencloned，buttheydiedastadpoles，neverlivinglongenoughtobecomeadultfrogs，whichmadethescientistsdespondent.Mice，sheepandcattlehavebeenclonedfromembryos.ButDollyisthefirsthealthycloneofanadultmammal.Howdidtheydoit?(1)Anunfertilizedeggwastakenfromasheep.(2)Theeggnucleuswasremoved.(3)Acellwastakenfromtheudder(乳房)ofapregnantsheep.Itwas“starved”，sothatitstoppedgrowing.(4)Thetwocellswerecombinedinto，andthenimplantedinathirdsheep，whereitgrewnormally.(5)Theclonewasborn.Itwasgeneticallyidenticaltothepregnantsheep.Thissoundsmucheasierthanitactuallywas.Toendupwithoneclone，thescientistsstartedwith277uddercells.Andtheyneededawaytomaketheeggcellacceptanewnucleus.Theydidthatbystarvingthecell.Itmaysoonbepossibletocl