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1、Unit4Globalwarming第二部分：阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分） 阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。A★★☆☆☆ Knownastheworld’sfirst-everclonedcamel,InjazwasborninDubaionApril8,2009.Injaz’srealmotherwaskilledinanaccidentin2005,butscientistssavedtheDNAan
2、dinjecteditintoanemptyeggcell(卵细胞)ofInjaz’snewmother.WithcamelracingbeingbigbusinessinDubai,suchabreakthroughmeansalot. CarbonCopyorCcsurprisedeveryonewhenshewasborn.Forastartshehadagreystripe(条纹)runningdownherwhitebackwhereasherrealmother,Rainbow
3、,sportedmoreofagoldandbrownstyle.Then,whenCcstartedtoplay,shewasfoundtoberatherplayful.Rainbow,however,hadalwaysbeenshyanddisinterested. BornonJuly7,1999,Daisywasclonedfroma13-year-oldcownamedAspen.ScientistshadoftenworriedthatcloningtheDNAofaneld
4、erlyanimalwouldresultinhealthproblemsforthenewbornanimal.ButDaisyproveddoubterswrongwhenshewasabletogivebirthnaturallytwoyearslater. Deweybecametheworld’sfirst-evercloneddeerwhenhewasbornonMay23,2003attheCollegeofVeterinaryMedicineinTexas.Deweyisa
5、white-taileddeerandbecamethefifthanimalthecollegehadsuccessfullycloned,theothersbeingapig,cattle,goatsandacat. LittleIdahoGemcelebratedadoublewhenhewasborninMay2003becomingboththeworld’sfirstclonedmule(骡) andtheworld’sfirstcloneconnectedtothehorse
6、family.Financedbyawealthymule-racingperson,IdahoGem,alongwithanotherclonedmule,IdahoStar,wassenttoatrainerforasuccessfulcareeronthetrack. InOctober2005twowolvesinKoreaweresuccessfullyclonedtoavoidextinction.SnuwolfandSnuwolffywerebornintheSeoulZoo
7、.UnfortunatelySnuwolfdiedinAugust2009fromaninfectionwhichhadabsolutelynothingtodowiththecloningprocessaccordingtothescientists.21.BothInjazandIdahoGem_____.A.wereborninacollegeinTexasB.losttheirmotherinanaccidentC.havesomethingtodowithsportsD.havesuffe
8、redserioushealthproblems22.WhywerepeoplesurprisedatCarbonCopy?A.Hertailwasmuchlongerthanhermother’s.B.Shedidn’tlookoractexactlylikeherrealmother.C.Shedidn’tshowanyinterestintheothercats.D.Herbackwasmuchbrighterthanhermother’s.23.Whatcan
