2023屆北京市北京一零一中高考臨考沖刺英語(yǔ)試卷含解析

2023高考英語(yǔ)模擬試卷注意事項(xiàng)1．考生要認(rèn)真填寫考場(chǎng)號(hào)和座位序號(hào)。2．試題所有答案必須填涂或書寫在答題卡上，在試卷上作答無(wú)效。第一部分必須用2B鉛筆作答；第二部分必須用黑色字跡的簽字筆作答。3．考試結(jié)束后，考生須將試卷和答題卡放在桌面上，待監(jiān)考員收回。第一部分（共20小題，每小題1.5分，滿分30分）1．—Idroppedbyat6:00pmyesterdaybutfailedtoseeyouatyourhouse.—I________inagymatthattime.A．wasexercisingB．a(chǎn)mexercisingC．haveexercisedD．hadexercised2．Don’tleavematchesorcigarettesonthetablewithin______ofchildren.A．stretch B．expand C．reach D．extend3．AfirmfromNewZealandhasrevealedasetofroboticlegswhichtheyclaimwillsoonallow________wheelchair-boundpeopletowalkagain.A．extremely B．previously C．a(chǎn)ctually D．eventually4．—Allthecontainershavebeenunloaded!CanithavebeendonebyFrank?—Impossible!He________hiscarlastnight.A．hasfixedB．hadfixedC．wouldfixD．wasfixing5．Frankstudied_____EnglishlanguageinLondonforfouryears,sohegets____goodknowledgeofLondon.A．a(chǎn);the B．/;/C．/;a D．the;a6．––Didyouhavetodomuchforthedinnerparty?––Helen________everythingbythetimeIgothome.A．finishedB．wasfinishingC．wouldfinishD．hadfinished7．Quantitiesofsoil________inthearea,resultingintheincreasingnumberofnaturaldisasters.A．iswashedawayB．havewashedawayC．havewashedawayD．havebeenwashedaway8．----CouldIaskyouaprivatequestion?----Sure,A．pardonmeB．goaheadC．goodideaD．forgetit9．_______arecord-breakingsevenGoldenGlobes,themusicalLaLaLandsurprisinglydoesnotappealtoChineseviewers.A．WinningB．WonC．HavingwonD．Towin10．Sodifficult____ittoworkouttheproblemthatIdecidedtoaskTomforadvice.A．Ididfind B．didIfindC．Ihavefound D．haveIfound11．John,________moneywasnownoproblem,startedanewcompanywithhisfriends.A．forwhose B．ofwhoseC．ofwhom D．forwhom12．Iamsothrilledtohavemyunderwaterphotos______intheNationalGeographicandonthecover!A．tobefeatured B．featured C．beingfeatured D．tofeature13．Tianjinsoccerfanswonderhowlongitwillbe______thepopularsoccerstar—SunkecanappearinthefieldsinTianjinasamemberofTianjinTianhaisoccerteam.A．before B．sinceC．until D．where14．Sincethemiddleofthelastyear,thebike-sharingmarket_____inBeijing.A．boomedB．wasboomingC．willboomD．hasboomed15．I________mycellphonelastnight.Nowthebatteryisrunningout.A．couldhavecharged B．mightchargeC．shouldhavecharged D．wouldcharge16．Thelivingroomiscleanandtidy,withadiningtablealready__________foramealtobecooked.A．laid B．layingC．tolay D．beinglaid17．Ihopethatwewillbeabletomakeitthroughthetoughtimesandbacktothebusinessofworkingtogether________ourcommongoals.A．onbehalfof B．inhonorof C．ontopof D．insearchof18．---Couldweaccomplishthetaskaccordingtotheschedule?---Idoubtthat.Theproblemremains______wecangetfinancialaidwithinthisweek.A．that B．how C．why D．when19．Ihopewhenyoucometomorrow,you_____thereadingandhavesomethingtoshare.A．did B．a(chǎn)redoingC．willbedoing D．willhavedone20．Pleasecallmysecretarytoarrangeameetingthisafternoon，or____________itisconvenienttoyou.A．wherever B．howeverC．whichever D．whenever第二部分閱讀理解（滿分40分）閱讀下列短文，從每題所給的A、B、C、D四個(gè)選項(xiàng)中，選出最佳選項(xiàng)。21．（6分）Statistically,airtravelisbyfarthesafestwaytotravelandyoucanmakeflyingevensafer,justbyfollowingthesesimplerules．Asyourchancesofbeinginvolvedinanairaccidentarepracticallynil（零）,manyoftheserulesconcernwhatyoushouldandshouldn’tdotomakeyourjourneysaferwhenyouareintheair.●Flyonnon-stoproutesMostaccidentsoccurduringthetakeoff,climb,descentandlandingperiodofaflight,soflyingnon-stopreducesyourexposuretothesecomplicatedprocedures.●ChooselargeraircraftAlthoughsmallaircraftshaveverygoodsafetyrecords,thosewithmorethan30passengerseatsaredesignedtocomply（遵守）withmuchstricterregulationsandaretestedmoreregularlytomakesuretheystillcomply.Also,intheunlikelyeventofaseriousaccident,largeraircraftsprovideabetteropportunityforpassengersurvival.●Payattentiontothepre-flightsafetybriefing（簡(jiǎn)報(bào)）Theinformationmayseemtoberepeated,butit'sworthlisteningtotheflightattendants.Andevenifyouhaveflownbefore,itdoesn'tmeanyouknoweverythingabouttheaircraftyou'reon,suchasthelocationoftheclosestemergencyexit.●StorethingssafelyNeverputveryheavyarticlesintheoverheadstoragebins.Theymayfalloutwhensomeoneopensthebinandcauseinjury.Also,thebinmaynotbeabletoholdheavierobjectsduringtheviolentmovementsofaircausedbythewind.●KeepyourseatbeltfastenedwhileyouareseatedCabincrewalwaystellyouthis,butit'simportant.Youcouldbeseriouslyinjurediftheplanehitstheviolentmovementofairunexpectedly.Alwaysfastenyourseatbeltifyouaretoldto.Thegeneralruleofflyingisthis:Ifyouaretoldtodosomething,doitfirstandaskquestionslater.●LettheflightattendantpouryourhotdrinksFlightattendantsaretrainedtohandlehotdrinkslikecoffeeorteainacrowdedaisleonamovingaircraft,soallowthemtopourthedrinkandhandittoyou.Neverasktotakeacoffeepotfromoneofthem.1、Whatisthegeneralreasonfortheseairsafetyrules?A．Whattodointheeventofacrash.B．Howtoavoidsuddenchange.C．Howtoimprovesafetywhileyouareflying.D．Howtoavoidinjury.2、Theunderlinedphrase"Thegeneralrule"inthefifthrefersto.A．a(chǎn)nythingtheflightstafftellyoutodoB．generalsafetyadviceC．walkingaroundtheplaneD．pouringhotdrinks3、WhichofthefollowingisNOTtrue?A．largerplaneshavemoresafetychecksandaresaferinanaccident.B．Take-offsaresaferonnon-stopflightsthanlanding.C．Everyaircraftisdifferent,sothesafetyproceduresmaybedifferent.D．Seatbeltsshouldbeworntoprotectagainstsuddenchange.4、Thebesttitleshouldbe.A．ThesafestwaytotravelB．AirsafetytipsC．Non-stopRoutesD．Howtotakeaplane22．（8分）StartingCyclingWehavetwoservicesdesignedtogivepeopletheconfidenceandknowledgetocyclesuccessfully.LessonsAllourinstructorshavebeentrainedtoNationalStandardslevelof“Bike-ability”.Thismeansyouwillbetrainedtoastandardconsistentacrossthewholecountry.Therearethreelevelsofskillstoprogressthrough.Childrenwouldstartlevels1&2,progressingfromtheplaygroundorparktocycleonlessbusylocalroads.Teenagerandadultbeginnerscanalsolearnlevels1&2inanoff-roadandquietenvironment.Confidentteenagersandadultscanbroadentheirskillsbylearninglevel3,usingmulti-laneroadsandlargerroundabouts.Weprovidebothcompletepackagesoflessonsforthebeginnerorindividuallessonstailorstotheclient.Whatevertheneedwecanaddressandpracticeuntilperfect!Costis＆30perhour.GuidedRideWeknowthatridingontheroadsinLondoncanbescary,andifyouhavetonavigate(確定行車路線)aswellitcanbecomearealhardtask!TheGuidedRideservicetakesallthestressoutofitforyoubyprovidingthefollowing:Routeplannedinadvancetosuityourskilllevel.Routemapprovidedtoyou.Cycleandequipmentchecked.Wewillteachyouasimplemethodtocheckbasicroadworthiness(車輛性能)ofyourbikethatyoucanperformonaweeklybasis.Routediscussedandfocusgiventoanyareasrequiringspecialattention.Cyclealongwiththeinstructorclosebehind.Herethetrafficcanbecontrolledbytheinstructorandriderobserved.WecurrentlycoverLondonZones1&2.Pleasecontactusifyourrequirementsareoutsideoftheseareas.Cost＆30perhour.1、Wherecanlevel1&2lessonsforadultbeginnersbecarriedout?A．Offroad. B．Nearlargeroundabouts.C．Onbusylocalroads. D．Onmulti-laneroads.2、WhatservicesdoestheGuidedRideprovide?A．Theycheckyourcycleandequipmenteveryweek.B．TheyhelpyoutobefamiliarwithallLondonroads.C．TheyletusersexperiencethebusiestroadinLondon.D．TheyensureusersridesafelyinLondonzones1&2.3、Whoisthetextprobablyintendedfor？A．Bikeridinglovers. B．Childrenandteenagers.C．TravelersinLondon. D．Parentslovingcycling.23．（8分）IntheshorttimeSteveandZachhadbeeninsidetheirtentpackingtheirtools,wind-blownflamehadskippedfromthetopofonetreetoanother.Thelongdrysummerhadturnedtheforestintoatinderbox.“Let’sgo!Wecanmakeitbacktotheriverwecrossedtoday!”StevekeptBradyontheleadandtheirheadsdownagainstthefire-wind.ButBradybarkedasharpwarning.Aheadofthemlayathickcurtainofsmokeacrossthetrack.Theywouldnevermakeitthroughthat.Thedogwaspullingathisleadtryingtodrawthemawayfromthesmoke,andyetStevewasuneasy.Itseemedtohimthattheyweremovingawayfromtheriver.Suddenly,Zachcried.“Zach!”Steveshouted.“AreyouOK?Whereareyou?”ThenBradypulledStevedownasharpslope(坡).Atitsbase,Zachwasrubbinghisankle.AsStevehelpedhisfriendtohisfeet,Bradyliftedhisheadandsnuffed(嗅)thesmoke-ladenwind.Nextmoment,thedogboundedawayanddisappeared.Theboysshoutedforhim,buthedidn’tcomeback.Stevecouldn’tblameBradyforpanicking.Hehimselfwantedtoruneventhoughhedidn’thaveacluewhichway.SteveandZachhadn’tgonefarwhentherewasafamiliarbark,andBradycamebounding,stoppeddirectlyinfrontofSteveandhithimwithhishead,pushinghimbacktowardtheslopethey’djustclimbed.ButStevedidn’tgetit.ThenBradygrabbedtheboy’sjeansandstartedpulling.Themessagewasclear,butStevehesitated.OfcourseherememberedBradysavinghisuncle’slifewhenthedogwasmuchyounger.Washestillsharpenoughtogetthemthroughthis?Nearby,apinewentupinawhooshofsmoke.Bradypulledagain,urgently.“OK,bigguy,”Stevegritted(咬緊牙關(guān)).Bradyledthembackdowntheslopeandintothetrees.Notfarfromthemfirewastouchingunderbrush.Severaltimesthebigdogstopped.Oftenhechangeddirections.Stevewassotiredthathejustwantedtorest,butBradywouldn’thaveit.Thedogbulliedbothboystogoon.Howlongthey’dwalkedStevehadnoidea.Hewasalmostnumbwhenheheardit—thewonderfulsoundofrushingwater!1、WhathappenedtoSteveandZachatfirst?A．Theygotinjured. B．Theylosttheirdog.C．Theyweretrapped. D．Theybecameseparated.2、Bradyranawayto______.A．seekhelp B．findawayoutC．rescueZach D．escapeforlife3、HowdidStevefeelafterBradypulledhisjeans?A．Uneasy. B．Impatient.C．Numb. D．Uncertain.4、Thepassagebasicallydescribes________.A．a(chǎn)nadventure B．a(chǎn)nexplorationC．a(chǎn)nescapegame D．a(chǎn)trainingprogram24．（8分）WhistlerWorldskiSnowboardFestivalTherearemanyreasonswhytheWorldSki&SnowboardFestivalhasbeensopopularforthepast22years.KnowntolocalsasWSSF,thefestivalcombinesspringenergywithWhistlersuniquemountainculture.Itisbeingheldfrom10thAprilto15thApril,attheWhistlerConferenceCentreinWhistler.Canada.Therearephotography,filmmaking,skiandsnowboardcompetitions.WSSFScheduleBelowaresomeoftheevents.Tuesday,April10Eightfamousadventurersgivevisualstoriestotheaudience.TheeightpeopleincludemountainbikersDarrenBerreclothandHansRey,climberJohnLong,diverJillHeinerth,snowboarderAlexWarburton,skierJohnnyThrash,andadventurersCaseyBrownandTedBaird.Wednesday,April11Thisfreeexhibitgivesyouadeeperlookatmountainculture.Itgoesfurtherthansimplylandscapesandwildlife.TheexhibitwillbeopentoeveryonefromApril1ltoApril13.Teamshave72hourstoshoot,editandproduceashortfilmtakenwithin100kilometresofWhistlerVillage.Judgeswillchoosejustonewinnerfor“Bestofshow”.Thursday,April12Sixphotographerscompetetoamazethejudgesandtheaudiencewithpicturesthatrecordsports,cultureandthehumanspirit.Friday,April13WhistlerBlackcombisthefourthstopinBritishColumbia,Canada,forthissnowboardcontest.Thecontestisfreetoenterandthetwochampions(manandwoman)willshareC$50,000.Saturday,April14Competitorsincludeamixofracinglegends.Theaudiencecanviewtheskiraceforfree.*TheskiracedependsontheweatherandisscheduledforSaturday,April14butmaybemovedtoFriday,Aforup-to-dateinformation.1、WhatcanwelearnabouttheWorldSkiSnowboardFestival?A．Itisaseven-dayfestivalB．ItisheldinAprileveryyear.C．Ithasahistoryofovertwentyyears.D．Itisbestknownforwhistlersmountainculture.2、WhatcanvisitorsdoduringtheWorldSkiSnowboardFestival?A．EnjoyfilmsmadebycompetitorsonApril11.B．SeeeightfamousmountainbikersonApril10.C．WatchaskiracethatwilldefinitelyhappenonSaturday.D．ViewanexhibitfeaturingmountaincultureonApril12.3、Whichoftheeventsmentionedinthetextoffersaprize?A．Theskirace.B．Thesnowboardcontest.C．Thephotographycompetition.D．Thefilmmakingcompetition.25．（10分）Onacollegecampingtrip,curiosityaboutwavesandsandcausedRobThielertostudyshorelinesaroundtheworld.ThirtyyearslaterandnowaU.S.GeologicalSurveyresearchgeologist,Thieler,iscombiningscienceandsmartphonetechnologytohelpstudyabird,whichisdyingout,theAtlanticCoastpipingplover.ThepipingploverisashorebirdthatlivesalongtheAtlanticCoast,theGreatLakesandtheGreatPlains.Risingsealevelassociatedwithclimatechange,aswellasincreaseddevelopmentoftheirbeachhabitats（棲息地）,threatensthespecies.Tohelptrackchangesinpipingploverhabitats,ThielerdevelopedafreeappcallediPloverin2012.Thisisamarkedchangefromthetypicalwayscientistscollectdata.SincereleasingiPlover,scientistshavegathereddataacross1,500kmofbreedingrange.ThatequalsaboutathirdofthedistanceacrosstheU.S.,whichisalargeareatocoverforonlytwothousandbreedingpairsofpipingploversontheeastcoast.Insteadofhavingtotravelandspenddaysateachsite,anumberofcooperatorsinthefieldusetheapptocollectandsenddata,allowingscientiststogatherdatamoreefficiently.Italsoallowsthemtocollectdataatthesametimeduringeachbreedingseason,providingabetterpictureofchangesthathappenoverlongerperiodsoftime.Andfast,centralizedaccessmeansscientistscanlookatdataquicklytogetareal-timeideaofwhereandhowpipingploversareusingtheirhabitats.WhileiPloverisusedbytrainedfieldstaff,otherappsliketheU.S.GeologicalSurvey’sweb-based“iCoast—DidtheCoastChange?”invitecitizenscientiststoidentifycoastalchangesbycomparingaerial（從飛機(jī)上的）photographstakenbeforeandafterstorms.Alltheinformationscientistsandcitizenscientistsalikecollecthelpsfederalandstateagenciescreatepolicyplansforaddressingclimatechangeimpacts（影響）worldwide.1、Whatcanweknowaboutthepipingplover?A．Itsbehaviourischanging.B．Itshabitatisgrowingbigger.C．Itslivingenvironmentisbecomingworse.D．ItsbreedingrangeislimitedtotheAtlanticCoast.2、WhydidThielerdevelopiPlover？A．TostudyshorelinesacrossAmerica.B．Toadvanceinformationtechnology.C．Tostudyglobalclimatechange.D．Tomonitorchangesofpipingploverhabitats.3、Whichofthefollowingbenefitstheshorebird?A．Thecampingequipment. B．Researchonsmartphones.C．Thechangeablecoast. D．Progressintechnology.4、Whatwouldbethebesttitleofthetext?A．ProtectingEndangeredShorebirds B．RobThieler,aCreativeScientistC．iPlover,aToolforTrainingFieldStaff D．DifferencesBetweeniPloverandiCoast第三部分語(yǔ)言知識(shí)運(yùn)用（共兩節(jié)）第一節(jié)（每小題1.5分，滿分30分）閱讀下面短文，從短文后各題所給的A、B、C和D四個(gè)選項(xiàng)中，選出可以填入空白處的最佳選項(xiàng)．26．（30分）TheBestHolidayIwasunbelievablyproudofmynine-year-olddaughter,Emily.1tobuyamountainbike,she’dbeensavingherpocketmoneyallyear,aswellasdoingsmalljobstoearnextramoney.ByThanksgiving,shehadcollectedonly$49.Isaid,“You2haveyourpickfrommybicycle3choose.AsChristmas4near,EmilyandIwentbikeshopping.Asweleftonestore,she5”ThroughoutDecember,Emilycontinuedtoworkhard.Thenoneday,shemadea6announcement.“YouknowallthemoneyI’vebeensaving?”shesaidhesitantly.“I’mgoingtogiveittothepoorpeople.”SoonecoldmorningbeforeChristmas,Emilyhandedhertotalsavingsof$58toavolunteerwhowasreallyvery7.8byEmily’sselflessness,Idecidedtocontribute9ofmyoldbicyclestoacardealerwhowascollectingusedbikesforpoorchildren10Iselectedashinymodelfrommycollection,however,itseemedasifasecondbiketookonaglow.ShouldIcontributetwo?No,onewouldbeenough.ButIcouldn’t11thefeelingthatIshouldgiveasecondbike.WhenIlater12thebikes,thecardealersaid,“You’remakingtwokidsvery13,sir.Hereareyourtickets.Foreachbicyclecontributed,we’re14awayonechancetowinagirl’smountainbike.”Whywasn’tIsurprisedwhenthatsecondticketprovedtobethe15?IliketothinkitwasGod’swayof16heryear--whilegivingherdadalessoninthe17.1、A．Promised B．Amazed C．Determined D．Organized2、A．need B．should C．must D．can3、A．collection B．contribution C．shop D．club4、A．seldom B．likely C．slightly D．merely5、A．drew B．became C．went D．pulled6、A．observed B．sensed C．watched D．noticed7、A．work B．charge C．time D．change8、A．disappointing B．surprising C．formal D．public9、A．a(chǎn)greeable B．hopeful C．thankful D．pitiful10、A．Moved B．Shocked C．Persuaded D．Demanded11、A．one B．some C．two D．a(chǎn)ny12、A．While B．As C．Because D．Though13、A．express B．describe C．explain D．shake14、A．returned B．delivered C．chose D．shared15、A．sweet B．healthy C．happy D．fair16、A．putting B．giving C．storing D．signing17、A．present B．harvest C．winner D．chance18、A．greeting B．praising C．sheltering D．rewarding19、A．under B．before C．beyond D．within20、A．process B．project C．struggle D．communication第二節(jié)（每小題1.5分，滿分15分）閱讀下面材料，在空白處填入1個(gè)適當(dāng)?shù)膯卧~或括號(hào)內(nèi)單詞的正確形式。27．（15分）Parkour(跑酷)isasportwhichtrainspeopletodealwithanyphysicalobstaclesintheirpath.Itisnotacompetitionbutaphysicaltraining.Apersonjoininginparkouriscalledtraceur.Traceursrunalongapathanduseonlytheirbodiestodealwithobstaclesinthemostefficientway.Parkourpaysmoreattentiontoefficiency,1．(make)itdifferentfromthesimilarpracticeoffreerunning.Parkour2．(common)includesrunning,jumping,climbing,rollingandothersimilartypesofphysicalmovements.Manyteenagersthinkthatparkourisquite3．coolsport.Theyhavegreatinterestinit.The4．(invent)ofparkourcan’t5．(give)toonepersonbecausemanypeoplehaveworkedonit.Afrenchofficerdevelopedtheearlierformofparkour.Theterm“parkour”wasfirstintroducedbyDavidBelleandSebastiarFoucanintheearly1980s.6．thattime,theyweretwoteenagers.Thissport7．(become)morepopularinthe1990swhenmanyfilmsweremadeonit.8．makesparkourdifferentfromothersportsisitspowertobringpeopletogether.Itallowstraceurstoforgetthe9．(society)andotherproblems,andmakesalargegroupworkandgrowtogetherinsteadofcompetingwitheachother.Peoplecanbenefitfromparkourasitcanmakethemstronger.Still,italsoinfluencesone’sthoughtprocessbyimprovingself-confidenceandcritical-thinkingskills.Inthisway,parkourallowsonetodealwith10．(difficulty)indailylifeifheorshedealswiththemthroughparkour.第四部分寫作（共兩節(jié)）第一節(jié)短文改錯(cuò)（滿分10分）28．（10分）假定英語(yǔ)課上老師要求同桌之間交換修改作文,請(qǐng)你修改你同桌寫的以下作文。文中共有10處語(yǔ)言錯(cuò)誤,每句中最多有兩處。錯(cuò)誤涉及一個(gè)單詞的增加、刪除或修改。增加：在缺詞處加一個(gè)漏詞符號(hào)（∧）,并在其下面寫出該加的詞。刪除：把多余的詞用斜線（﹨）劃掉。修改：在錯(cuò)的詞下劃一橫線（___）,并在該詞下面寫出修改的詞。注意: 1．每處錯(cuò)誤及修改均僅限一詞；2、只允許修改10處,多者（從第11處起）不計(jì)分。thatthere第二節(jié)書面表達(dá)（滿分25分）29．（25分）假如你是高中生李華，得知你校交換生英國(guó)朋友Brown對(duì)中國(guó)傳統(tǒng)文化藝術(shù)很感興趣，寫信邀請(qǐng)他一起去看京劇。主要內(nèi)容：1.簡(jiǎn)介：京劇(BeijingOpera)歷史悠久，服裝(costume)色彩艷麗，講述歷史故事等。2.告知地點(diǎn)、約定時(shí)間、購(gòu)票安排等。注意:1.詞數(shù)100左右；開(kāi)頭、結(jié)尾已給出。2.可以適當(dāng)增加細(xì)節(jié)，以使行文連貫。DearBrown,I’mLiHua.______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Lookforwardtoyourearlyreply.Yours,LiHua

參考答案第一部分（共20小題，每小題1.5分，滿分30分）1、A2、C3、B4、D5、D6、D7、D8、B9、C10、B11、D12、B13、A14、D15、C16、A17、A18、B19、D20、D第二部分閱讀理解（滿分40分）閱讀下列短文，從每題所給的A、B、C、D四個(gè)選項(xiàng)中，選出最佳選項(xiàng)。21、Spaceiswhereourfutureis—tripstotheMoon,Marsandbeyond.Mostpeoplewouldthinkthatasidefromcomets(彗星)andstars,thereislittleelseoutthere.But,sinceourspacejourneystartedwehaveleftsomuchtrash（垃圾）therethatscientistsarenowconcernedthatifwedon'tcleanitup,wemayallbeinmortal（致命的）danger.Thefirstpieceofspacejunkwascreatedin1964,whentheAmericansatelliteVanguardIstoppedoperatingandlostitsconnectionwiththegroundcenter.However,sinceitkeptorbitingaroundtheEarthwithoutanyconsequences,scientistsbecameincreasinglycomfortableabandoning（拋棄）thingsthatnolongerservedanyusefulpurposeinspace.Itisestimated（估計(jì)）thattherearenowover500,000piecesofman-madetrashorbitingtheEarthatspeedsofupto17,500milesperhour.Thejunkvariesfromtinypiecesofpaintchippedoffrocketstocameras,hugefueltanks,andevenodditemslikethemillion-dollartoolkitthatastronautHeidemarieStefanyshynPiperlostduringaspacewalk.Themajorproblemwiththespacetrashisthatitmayhitworkingsatellitesanddamagetravelingspacecraft(飛船).Moreover,piecesofjunkmaycollide（碰撞）witheachotherandbreakintopieceswhichfallbacktotheE