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2019年6月大学英语四级真题及答案完整版（卷三）PartIWriting【题干】Directions:Forthispart,youareallowed30minutestowriteanewsreporttoyourschoolnewspaperonavolunteeractivityorganizedbyyourStudentUniontohelpelderlypeopleintheneighborhood.Youshouldwriteatleast120wordsbutnomorethan180words.PartⅢReadingSectionASectionADirections:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfromalistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices.Eachchoiceinthebankisidentifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswerSheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.Justbecausetheycan'tsingoperaorrideabicycledoesn'tmeanthatanimalsdon'thaveculture.There'snobetterexampleofthisthankillerwhales.Asoneofthemost_____(27)predators(食肉动物)，killerwhalesmaynotfitthe_____(28)ofaculturedcreature.However,thesebeastsoftheseadodisplayavastrangeofhighly_____(29)behaviorsthatappeartobedrivingtheirgeneticdevelopment.ThewordculturecomesfromtheLatincolere,which_____(30)meanstocultivate.Inotherwords,itreferstoanythingthatis_____(31)orlearnt,ratherthaninstinctiveornatural.Amonghumanpopulations,culturenotonlyaffectsthewaywelive,butalsowritesitselfintoourgenes,affectingwhoweare.Forinstance,havingspentmanygenerationshuntingthefatmarinemammalsoftheArctic,theEskimosofGreenlandhavedevelopedcertaingenetic_____(32)thathelpthemdigestandutilizethisfat-richdiet,therebyallowingthemto_____(33)intheircoldclimate.Likehumans,killerwhaleshavecolonizedarangeofdifferent_____(34)acrosstheglobe,occupyingeveryoceanbasinontheplanet,withanempirethat_____(35)frompoletopole.Assuch,differentpopulationsofkillerwhaleshavehadtolearndifferenthuntingtechniquesinordertogaintheupperhandovertheirlocalprey(猎物).This,inturn,hasamajoreffectontheirdiet,leadingscientiststo_____(36)thattheabilitytolearnpopulation-specifichuntingmethodscouldbedrivingtheanimals'geneticdevelopment.【选项】A.acquiredB.adaptationsC.brutalD.deliberatelyE.expressedF.extendsG.habitatsH.humbleI.imageJ.literallyK.refinedL.revolvesM.speculateN.structureO.thrivePartⅢReadingSectionBDirections:Inthissection,youaregoingtoreadapassagewithtenstatementsattachedtoeachstatementcontainsinformationgiveninoneoftheparagraphs.Identifytheparagraphfromwhichtheinformationisderived.Youmaychooseaparagraphmorethanonce.Eachparagraphismarkedwithaletter.AnswerthequestionsbymarkingthecorrespondingletteronAnswerSheet2.Livingwithparentsedgesoutotherlivingarrangementsfor18-to34-year-olds.[A]Broaddemographic(人口的)shiftsismaritalstatus,educationalattainmentandemploymenthavetransformedthewayyoungadultsintheU.S.areliving,andanewPewResearchCenteranalysishighlightstheimplicationsofthesechangesforthemostbasicelementoftheirlives—wheretheycallhome.In2014,forthefirsttimeinmorethan130years,adultsages18to34wereslightlymorelikelytobelivingintheirparents'homethantheyweretobelivingwithaspouseorpartnerintheirownhousehold.[B]ThisturnofeventsisfueledprimarilybythedramaticdropintheshareofyoungAmericanswhoarechoosingtosettledownromanticallybeforeage35.Datingbackto1880,themostcommonlivingarrangementamongyoungadultshasbeenlivingwitharomanticpartner,whetheraspouseorasignificantother.Thistypeofarrangementpeakedaround1960,when62%ofthenation's18-to34-year-oldswerelivingwithaspouseorpartnerintheirownhousehold,andonlyone-in-fivewerelivingwiththeirparents.[C]By2014,31.6%ofyoungadultswerelivingwithaspouseorpartnerintheirownhousehold,belowthesharelivinginthehomeoftheirparent(s)(32.1%).Some14%ofyoungadultslivedalone,wereasingleparentorlivedwithoneormoreroommates.Theremaining22%livedinthehomeofanotherfamilymember(suchasagrandparent,in-laworsibling(兄弟姐妹)),anon-relative,oringroupquarterslikecollegedormitories.[D]It'sworthnotingthattheoverallshareofyoungadultslivingwiththeirparentswasnotatarecordhighin2014.Thisarrangementpeakedaround1940,whenabout35%ofthenation's18-to34-year-oldslivedwithmomand/ordad(comparedwith32%in2014).Whathaschanged,instead,istherelativeshareadoptingdifferentwaysoflivinginearlyadulthood,withthedeclineofromanticcouplingpushinglivingathometothetopofamuchlessuniformlistoflivingarrangements.Amongyoungadults,livingarrangementsdiffersignificantlybygender.Formenages18to34,livingathomewithmomand/ordadhasbeenthedominantlivingarrangementsince2009,In2014,28%ofyoungmenwerelivingwithaspouseofpartnerintheirownhome,while35%werelivinginthehomeoftheirparent(s).Youngwomen,however,arestillmorelikelytobelivingwithaspouseofromanticpartner(35%)thantheyaretobelivingwiththeirparent(s)(29%).[F]In2014,moreyoungwomen(16%)thanyoungmen(13%)wereheadingupahouseholdwithoutaspouseorpartner.Thisismainlybecausewomenaremorelikelythanmentobesingleparentslivingwiththeirchildren.Fortheirpart,youngmen(25%)aremorelikelythanyoungwomen(19%)tobelivinginthehomeofanotherfamilymember,anon-relativeorinsometypeofgroupquarters.[G]Avarietyoffactorscontributetothelong-runincreaseintheshareofyoung.Adultslivingwiththeparents.Thefirstinthepostponementof,ifnotretreatfrom,marriage.Theaverageageoffirstmarriag