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2005年初赛PartVReadingComprehension(25minutes,35points)SectionAMultipleChoice(5points)Directions:Thereis1passageinthissectionwith5questions.Foreachofthem,therearefourchoicesmarkedA,B,CandD.Youshoulddecideonthebestchoice.ThenmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecentre.Questions56to60arebasedonthefollowingpassage.NewFindingsinArchaeology●SouthAmericaandMadagascarwerejoined70millionyearsagoPicture:ReutersAnoldcroc:ThediscoveryinBrazilofanearlycompletefossilisedskeletonoftheprehistoriccrocodileUbera-basuchusterrificus,above,supportstheoriesthatSouthAmericaandMadagascarwerejoined70millionyearsago.●We'vealljustgot40,000yearsolderTwoskullsfoundinAfricahavebeenidentifiedastheoldesthumanremainsknowntoscience.Thefossilisedbonesfoundin1967wereoriginallythoughttobe130,000yearsold.Butare-datingofrocklayersnearthosewhichyieldedthefossilsshowedtheyareactuallyabout195,000yearsold—fromthetimemodernhumansemerged.Theskulls,knownasOmoIandII,pushbacktheknownpresenceofHomosapiensinAfricaby40,000years.ThepreviousoldestHomosapiensskulls,datedtobetween154,000and160,000yearsold,werefoundnearavillagecalledHertointheafarregionofeasternEthiopia.OmoIandIIwereunearthedbyfamouspalaeontologistRichardLeakeyalongtheOmoRiverinsouthernEthiopia,nearthetownofKibish.OmoI'smoremodernfeaturesledtodisagreementamongexpertsoverwhethertheywerethesameage.Therocksinwhichtheywerefoundshowtheyare,saidAustralianarchaeologistProfIanMcDougall,whomadethediscovery.Hetoldscientificjournal“Nature”:“OmoIandOmoIIarerelativelysecurelydatedto195,000yearsold,makingthemtheoldestanatomicallymodernhumanfossilsyetrecovered.”Questions:56.Bywhichmeanscouldthescientiststelltheageoffossilstheyhavefound?A.Thebonesofthefossils.B.Theplacewheretheywerefound.C.Thehistoryofhumans.D.Identifyingtherocklayersofthefossils.57.Howmanyyearsolderhasourspeciesbecomebythenewdiscovery?A.130,000.B.40,000.C.195,000.D.Between154,000and160,000.58.WhereweretheOmoIandIIfound?A.NearHerto.B.AlongtheOmoRiv
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