Arecentannouncementbyscientiststhattheyhavesuccessfullyclonedthefirsthumanembryohascausedmuchdebateandhasshockedmanypeoplearoundtheworld.Ontheonehand，somescientistspointoutthatifyoucloneanembryo

　　Arecentannouncementbyscientiststhattheyhavesuccessfullyclonedthefirsthumanembryohascausedmuchdebateandhasshockedmanypeoplearoundtheworld.Ontheonehand，somescientistspointoutthatifyoucloneanembryo，youcanproducevaluabletissues(组织）andorgansthatcouldbeusedtosavehumanlives.Ontheotherhand，manypeople，includingsomescientistsdisagreeandfearthatifmankindinterfereswith（干涉）natureinthisway，theymaybeontheirwaytoproducingareal-lifeFrankenstein’smonster.

　　 Cloningisproducinganexactcopyofaplantorananimalusingitscells.ThefirstmammaltobeclonedsuccessfullyfromanadultcellwasDollythesheep.Shewasbornin1996anddiedinearly2003，atamuchyoungeragethannormal.Whenshewasborn，manypeoplewereangrybecausetheythoughtcloningwouldcreatemorediseaseintheanimalworld.However，ingeneralthescientistswerepraisedfortheirwonderfulscientificbreakthrough.

　　TheScottishscientistwhocreatedDolly，IanWilmut，isshockedthatsomescientistsarenowconsideringcloninghumanbeings.Althoughheresearchescloning，hisintentionhasneverbeentocreatecopiesofhumans.Instead，hethinksresearcheffortsshouldconcentrateoncreatingnewtissuesandorgansthatcouldeventuallybeusedtocurediseaseslikecancer.However，somepeopleconsiderthatcloninghumanembryoswiththeintentionofdestroyingthemshowsnorespectforhumanlife.

　　Whilecloninghumanembryosisillegalinmanycountries，somescientistsarealreadypushingaheadwithresearchsoastodeliveraclonedhumanbaby.SeverinoAntinori，anItaliandoctor，isoneoftheleadersinthiskindofresearch.Hehasdeclaredthathewantstobethefirsttocloneahumanbeing.

　　InChina，scientistshavefocusedtheireffortsoncloninganimals，aswellassterncellstobeusedinmedicalresearch.Chinahassucceededinproducingclonesofcowsandgoats，andcontinuestoresearchwaysinwhichcloningcanbenefitmankind.

　　51.WhichofthefollowingstatementsaboutcloningisTRUEaccordingtothepassage?

　　A.Cloningtechnologycanonlybeappliedtoanimals.

　　B.Aclonedanimalcanlivelongerthananormalone.

　　C.PeopleallovertheworldarehappyaboutthebirthofDolly.