2015年高考英语真题分类汇编：专题20 议论文和说明文类+解析

专题二十完形填空之议论文和说明文类1.【2015·广东】完形填空·广东】完形填空（共15小题；每小题2分，满分30分）阅读下面短文，掌握其大意，然后从1~15各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。Howlongcanhumanbeingslive?Mostscientistswhostudyoldagethinkthatthehumanbodyis___1___tolivenolongerthan120years.However,110yearsisprobablythelongestthatanyonecouldhopetolive——ifheorsheis___2___healthyandlucky.Somescientistsevensaywecanliveaslongas130years!Yet,ourcellssimplycannotcontinuetoreproduce___3___.Theywearout,andasaresult,wegetoldand___4___die.Eventhoughwecan’tliveforever,wearelivinga___5___lifethaneverbefore.In1900,theaverageAmericanlifespan(寿命)wasonly47years,buttodayitis75years!Whendoesoldagebeginthen?Sixty-fivemaybeout-of-dateasthe___6___linebetweenmiddleageandoldage.Afterall,manyolderpeopledon’tbegintoexperiencephysicalandmental___7___untilafterage75.Peoplearelivinglongerbecausemorepeople___8___childhood.Beforemodernmedicinechangedthelawsofnature,manychildrendiedofcommonchildhood___9___.Nowthatthechancesofdying___10___aremuchlower,thechancesoflivinglongaremuchhigh