完型填空a期末复习资料

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1、完型填空A2、Throughouthistorymanhashadtoacceptthefactthatalllivingthingsmustdie,butpeoplenowlivelongerthanthey]・Yet,alllivingthingsstillshowthe2ofaging,whichwilleventually3death.Agingisnotadisease,butasapersonpassesmaturity,thecellsofthebodyandtheorganstheyformdonotfunctionaswellastheydidinchildhood・

2、Thebodyprovidesless4againstdiseasesandismoreinclined5accident.Anumberofrelatedcausesmaycontributetoaging.Somecellsofthebodyhaveafairlylonglife,buttheyarenot6whentheydie.Inanagingpersonthenewcellsmaynotbeascapable7growthasthoseofayoungperson.Another8inagingmaybechangeswithinthecellsthemselves.Som

3、eoftheproteinchemicalsincellsareknowntochangewithageandbecomelessflexible.Thisiswhytheskinofoldpeoplewrinkles.Thisisalsothereasonoldpeople9inheight.Theremaybeothermoreimportantchemicalschangesinthecells・Somecomplexcellchemicals,suchasDNAandRNA,storeand10informationthatthecellsneed・Agingmayaffect

4、thisprocessandchangetheinformation-carryingmoleculessothattheydonottransmittheinformationaswell.⑴、A：hadB:usetoC：wereusedtoD：usedto答案：D⑵、A：factB:effectC：functionD：symbol答案：B⑶、A：affectB:produceC：resultinD：resultfrom答案：c⑷・A：protectionB:demandC：declineD：delay答案：A⑸、A：toB：forC：againstD：from答案:A⑹A：repl

5、acedB：bornC：recoveredD：discovered答案：A(7)、A：withB：forC：ofD：to答案：C⑻、A：factorB:effectC：reasonD：element答案：A⑼、A：shortB：shrinkC：lengthenD：increase答案：B(10)、A：passtoB:passfromC：passonD：passonto答案：c3、Certainly,themostpopularmethodoftravelingusedbyAmericansistheprivately-ownedautomobile.ThevastmajorityofA

6、mericanshaveacar,andmanyfamilieshavetwo._IduringyourvisittotheUnitedStates,youmaydecidetorentacartotraveloutsidethecityortotraveltootherpartsofthecountry.Carrentalcompaniesare2inthetelephonebookandarelocatedinmostcitiesandtowns・3,thereareusuallyrentalcarsatairportsandtrainandbusstations・Asistrue

7、everywhereintheworld,youcanrentacar4theday,week,ormonth.Somecompanies_5_havespecialweekendratesthatyoumayfindespeciallyinterestingifyouhaveonlyalimited6_oftimetotravelaroundtheareayouarevisiting・Sinceeachcompanyhaditsownrule