高考英语完形填空精练.doc

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1、Throughouthistorymanhashadtoacceptthefactthatalllivingthingsmustdie.Butpeoplenowlivelongerthanthey36.Yet,alllivingthingsstillshowthe37ofaging,whichwilleventually38deaths.Agingisnotadisease,butasapersonpassesmaturity（成熟期）,thecellsofthebodyandthe39theyformdonotfunctio

2、naswellasthey40inchildhoodandteenageyears.Thebodyprovidesless41againstdiseaseandismore42tohaveaccident.Anumberofrelatedcausesmay43toaging.Somecellsofthebodyhaveafairlylonglife,buttheyarenot44whentheydie.Asapersonages,45ofbraincellsandmusclecellsdecreases.46.bodycell

3、sdieandarereplacedbynewcells.Inanagingpersonthe47cellsmaynotbeasworkableorascapable48growthasthoseofayoungperson.Another49inagingmaybechangeswithinthecells50.Someoftheproteinchemicalsincellsareknownto51withageandbecomelesselastic（有弹性的）.Thisiswhytheskinofoldpeoplewri

4、nkles（皱纹）andhangs52.Thisisalsothereasonwhyoldpeople53inheight.Theremaybeothermoreimportantchemicalchangesinthecells.Somecomplexcellchemicals,suchasDNAanRNA,storeand54informationthatthecellsneed.Agingmayaffectthis55andchangetheinformation-carryingmoleculessothattheyd

5、onottransmittheinformationaswell.36.A.wouldB.beusedtoC.usedtoD.used37.A.functionB.effectC.affectD.sign38.A.leadinB.giveinC.runintoD.resultin39.A.handsB.feetC.heartD.organs40.A.madeB.tookC.didD.remembered41.A.energyB.protectionC.vigorD.power42.A.likelyB.probableC.pos

6、sibleD.alike43.A.attendB.contributeC.addD.devote44.A.replacedB.rebornC.recoveredD.surrendered45.A.anumberB.theamountC.thenumberD.agreatdeal46.A.TheothersB.theotherC.AnotherD.Other47.A.oldB.leftC.newD.other48.A.toB.forC.ofD.in49.A.factorB.effectC.reasonD.element50.A.

7、itB.themC.themselvesD.that51.A.becomeB.turnC.changeD.get52.A.looseB.highC.largeD.fat53.A.increaseB.shrinkC.lengthenD.decrease54.A.passawayB.passbyC.passoffD.passon55.A.improvementB.processionC.approachD.process36——40CBDDC41——45BABAC46——50DCCAC51——55CABDDSwitzerland(

8、瑞士)isfamousforitswatches.However,thiscountrydidn’t16thewatch.ItwastheBritish17didit.Hereisastoryof18thewatchwas19toSwitzerland.Manyyearsag