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1、单元加餐练Ⅰ.阅读理解Theideaofcloningyourpetsoundslikealaughablewasteofmoney,becauseitis.Butitstartstoseemalittlelesslaughablewhenyourownbelovedpetstartsgettingolder.IfIhadhadafewhundredthousanddollarstospare,IknowIwouldhavehalfseriouslyconsidereditformydearlittlecat,whodiedlastyear.
2、OnecouplethatdoeshappentohaveafewhundredthousanddollarstospareisBarryDillerandDianevonFurstenberg,whohavereportedlyclonedtheirbelovedJackRussellTerrier(akindofdog),Shannon,andnowhavetwoidenticalJackRussellTerriers,namedDeenaandEvita.Whenyourpetdies,youjustwantyourpetback,or
3、atleastascloseacopyasyoucanget.Soit'sreallynosurprisethatofthearound600dogsclonedbySooamBiotechResearchFoundationmostwereclonedforsadpetowners.ThelabinSeoul,SouthKorea,isnowtheonlyplaceontheplanetinthebusinessofcloningpetdogsforowners.But,infact,thetechnologywon'tgiveyouyou
4、rpetback.Theredon'tyetappeartobeanystudiesonthebehaviorofclonedpets,butresearchonclonedcowsandpigshassofarshownmarkeddifferencesinbehaviorandevenlooksinclonedanimals.TheDNAisexactlythesame,buttherearestilldifferencesinpersonalityandappearance.EvenifDillerandvonFurstenburgra
5、isetheirnewdogsintheexactsameenvironmentintheexactsamewaythattheyraisedShannon,thenewdogswillstillbehavedifferently.“Thepromiseofpetcloningisthatyourclonedpetisgoingtobehaveandlookliketheoneyoualreadyhave—andthatwillnotbethecase(情况)，”saidProfessorJorgePiedrahitaatN．C.State.
6、“We'veclonedanimalsthatwereraisedinthesameenvironment,buttheystilldidn'tactthesame.”语篇解读：尽管宠物克隆技术已经比较成熟，但克隆出来的宠物并不会与原来的宠物一模一样。1．WhatcanwelearnaboutthelabinSeoul?A．Itwassetupbysomepetowners.B．Ithasclonedhundredsofpetdogs.C．Itchargesnothingforitsservices.D．Ithasclonedacatfort
7、heauthor.解析：选B 细节理解题。由第二段中的“Soit'sreallynosurprisethatofthearound600dogsclonedbySooamBiotechResearchFoundationmostwereclonedforsadpetowners”可知，这家实验室已经克隆了几百只宠物狗。2．Whydoestheauthormentionthestudiesonclonedcowsandpigs?A．Toexplainwhyfarmanimalsarecloned.B．Todiscusswhypetcloning
8、issopopular.C．Toshowclonedanimalsareverydifferentfromeachother.D．Toprovecloningisn
