2025届长春市重点中学高考英语二模试卷含解析

2025届长春市重点中学高考英语二模试卷考生请注意：1．答题前请将考场、试室号、座位号、考生号、姓名写在试卷密封线内，不得在试卷上作任何标记。2．第一部分选择题每小题选出答案后，需将答案写在试卷指定的括号内，第二部分非选择题答案写在试卷题目指定的位置上。3．考生必须保证答题卡的整洁。考试结束后，请将本试卷和答题卡一并交回。第一部分（共20小题，每小题1.5分，满分30分）1．Thelackofeco-friendlyhabitsamongthepublicisthoughttobeamajor_____________ofglobalclimatechange.A．Result B．causeC．warning D．reflection2．Asa(n)________andeffectivemethod,expresswaynoisebarrierisaprimarymeasureusedtoreducetrafficnoise.A．correctional B．flexible C．economical D．investigative3．ThatWasthefirsttimeshealoneathomeduringtheweekends，boredtodeath．A．hasleftB．hasbeenleftC．hadleftD．hadbeenleft4．I_____upmymindwhatIwasgoingtosayintheseminar,butitwascancelled.A．havemadeB．hadmadeC．wasmakingD．wouldmake5．Thechurchwhichiseasily________frommyhomeisbeingrebuilt.A．accessibleB．availableC．acceptableD．responsible6．Variousefforts________inthepastdecadestoprotecttheenvironment.A．hadmadeB．havemadeC．weremadeD．havebeenmade7．Sofar,morethan1300hotelsinEurope,Africa,MiddleEastregionhavecommittedto_________intheevent,withmanymore________tojointheeffort.A．participating;expecting B．participate;toexpectC．participating;expected D．participate;tobeexpected8．Manypeoplecomplainedaboutthestoneslyingonaroad,but_______didanythingaboutgettingthestonesoutoftheway.A．both B．noone C．none D．all9．—Iforgottoregisterforthecourses.I’monedaylateandmostoftheclassesarefull.WhatshallIdo?—________Youcan’tdoanythingaboutthat.A．Takeyourtime. B．Pooryou!C．Sowhat? D．Noway!10．Inrecentyears,ChineseartshavewontheofalotofpeopleoutsideChina.A．reputationB．enjoymentC．appreciationD．entertainment11．Usuallydoctorsareunderstandably________aboutnewmedicinesbecauseoftheuncertaintyoftheireffects.A．considerateB．logicalC．optimisticD．cautious12．Citizensare_____toexercisetheirrights,butundernocircumstancescantheyviolateotherpeople’srights.A．ontrack B．onscheduleC．atease D．atliberty13．Kunmingiscalled“SpringCity”,butit_____snowinwinter.A．shall B．can C．must D．might14．--Hello,Kate.Howisyourweekendathome?--Awful!YouknowitisthefirsttimeI____aloneathome,boredtodeath.A．hasleft B．hadleft C．hadbeenleft D．havebeenleft15．Iknowhefeelsupsetabouthisfailure,andIcan_____that.A．relateto B．livewithC．answerfor D．pullthrough16．Insteadofmakingchoicesfortheirchildren,liberalparentsusuallysay,“Gowhereyou________.”A．will B．shouldC．can D．must17．—Whatdidshewanttoknow,Tom?—ShewonderedwecouldcompletetheexperimentA．whenwasitthatB．itwaswhenthatC．itwaswhenD．whenitwasthat18．______tonuclearradiation,evenforashorttime,mayinfluencegenesinhumanbodies.A．Havingexposed B．BeingexposedC．Toexpose D．Exposed19．---Eachofthestudentsworkinghardattheirhardattheirlessonsthebook.---SohaveI.A．readsB．havereadC．hasreadD．read20．Istillfindithardtoimaginethatsuchacleverchild__________makesuchafoolishmistake.A．shall B．mustC．can D．should第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。21．（6分）TheMuseum:TheCharlesDickensMuseuminLondonistheworld'smostimportantcollectionofmaterialrelatingtothegreatVictoriannovelistandsocialcommentator．TheonlysurvivingLondonhomeofDickens（from1837until1839）wasopenedasamuseumin1925andisstillwelcomingvisitorsfromallovertheworld．Onfourfloors,visitorscanseepaintings,rareeditions,manuscripts,originalfurnitureandmanyitemsrelatingtothelifeofir7neofthemostpopularandbelovedpersonalitiesoftheVictorianage．OpeningHours

TheMuseumisopenfromMondaystoSaturdays10:00-17:00;Sundays11:00-17:00．

Lastadmissionis30minutesbeforeclosingtime．

Specialopeningtimescanbearrangedforgroups,whomaywishtobookaprivateview．AdmissionCharges:Adults:￡5．00;Students:￡4:00;Seniors:￡4．00;Children:￡3．00;Families:￡14．00（2adults&uptofivechildren）GroupRates:Foragroupof10ormore,aspecialgrouprateof￡4．00eachapplies．Childrenwillstillbeadmittedfor￡3．00each,Access:WeareconstantlyworkingtoimproveaccesstotheMuseumanditscollection．Ourcurrentprojectsinvolvethefittingofawheelchairrampforbetteraccess,acustomercarekitandanaudiotourforvisitorswithimpaired(受损的）vision．OurHandlingSessionsarealsosuitableforthevisuallyimpaired．TheMuseumhasdevelopedanonlinevirtualtourthroughtheMuseum．ClickheretovisitalltheroomsintheMuseumonline．HiretheMuseum:TheMuseumcanbehiredforprivatefunctions,performancessoirees（社交晚会）andmanyothersocialoccasions．FindUs:TheMuseummaybereachedbyusingthefollowingbuses:7,17,19,38,45,46,55,243．Andbytheseundergroundservices:PiccadillyLine;CentralLine．Foramap,pleaseclickhere．TheBritishMuseumandtheFoundlingMuseumarewithinwalkingdistance．1、Thepassageisprobablyfroma__________.A．book B．websiteC．newspaper D．announcement2、Comparedtogoingthereseparately,ifafamilywithtwoadultsandfivechildrengototheMuseumtogethertheywillsave________.A．￡25．00 B．￡14．00C．￡9:00 D．￡11．003、IntheCharlesDickensMuseum,peoplecannotfind___________.A．paintings B．rareeditionsC．manuscripts D．cars4、Accordingtothepassage,whichofthefollowingstatementsisTRUE?A．TheMuseumisnotveryfarfromtheBritishMuseum．B．InanycasepeoplecannotvisittheMuseumafter17:00．C．VisitorswithpoorvisioncannotenjoytheMuseum．D．AnyonecannothiretheMuseumforotherusers．5、Thepassageiswrittento___________.A．persuadereaderstovisitLondon．B．informreadersaboutthehistoryoftheCharlesDickensMuseum．C．offerreaderssomeinformationabouttheCharlesDickensMuseum．D．tellreadershowtomakeuseoftheCharlesDickensMuseum．22．（8分）Statistically,airtravelisbyfarthesafestwaytotravelandyoucanmakeflyingevensafer,justbyfollowingthesesimplerules．Asyourchancesofbeinginvolvedinanairaccidentarepracticallynil（零）,manyoftheserulesconcernwhatyoushouldandshouldn’tdotomakeyourjourneysaferwhenyouareintheair.●Flyonnon-stoproutesMostaccidentsoccurduringthetakeoff,climb,descentandlandingperiodofaflight,soflyingnon-stopreducesyourexposuretothesecomplicatedprocedures.●ChooselargeraircraftAlthoughsmallaircraftshaveverygoodsafetyrecords,thosewithmorethan30passengerseatsaredesignedtocomply（遵守）withmuchstricterregulationsandaretestedmoreregularlytomakesuretheystillcomply.Also,intheunlikelyeventofaseriousaccident,largeraircraftsprovideabetteropportunityforpassengersurvival.●Payattentiontothepre-flightsafetybriefing（简报）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．anythingtheflightstafftellyoutodoB．generalsafetyadviceC．walkingaroundtheplaneD．pouringhotdrinks3、WhichofthefollowingisNOTtrue?A．largerplaneshavemoresafetychecksandaresaferinanaccident.B．Take-offsaresaferonnon-stopflightsthanlanding.C．Everyaircraftisdifferent,sothesafetyproceduresmaybedifferent.D．Seatbeltsshouldbeworntoprotectagainstsuddenchange.4、Thebesttitleshouldbe.A．ThesafestwaytotravelB．AirsafetytipsC．Non-stopRoutesD．Howtotakeaplane23．（8分）SusanwasbornastheninthchildinaCatholicfamily.Shesufferedfromlearningdisabilitieseversinceherbirthbecauseofhermother’spoorhealth.SchoolwasdifficultforSusanandshewasbulliedbecauseofherdifferentbehaviors.Hersiblings,whoweremucholder,hadlifeexperiencesthatwereunknowntotheirlittlesister.Fromthetimeofherbirth,Susanwasascreamer.Theonlyreallysafeplacethatshewoulduseasarepeatwasherbedroom.Thereshewouldhangpostersofhermusicalidolsonthewallandsingpopularmusicintoahairbrushthatshepretendedwasamicrophone.OnebyonethesiblingsmovedawayfromhomeandthenSusan’sfatherdied.Thisleftheralonewithanagingmotherandacat.ThesiblingsaccusedhermotherofnotexpectingmoreoutofSusan.Shehadseenmanyprofessionalsandrememberedhearingtheword“borderline”butdidn’tknowwhatitmeant.Shetriedvolunteerwork.Herbeststateofmind,however,wasfoundwhenshewassingingandsoshewouldregularlyjoinothersinkaraokeorpubswhereshecouldshowherskillsandreceiveappreciationfromthecrowd.WhenSusanannouncedatChristmasthatshewasplanningtocompeteintheBritain’sGotTalentcontest,hersiblingstriedtodiscourageher.Itwasawonderthatshewasevenabletodotheauditionconsideringthetroublesshefacedjustphysicallygettingtotherightplace.“TheWomanIWasBorntoBe”isabeautifulstorywritteninthesimplebuthumorousvoiceoftheauthor,SusanBoyle.Shetellsherstoryfrombirthtothepresentinaninterestingandeducationalmanner.Thewritingissupplementedbyphotosfromheralbums.Ilovethisbook!Infact,Ireadthewholethinginoneday!Thereissomethinginthestoriesthatnotonlyteachesthereaderbutalsoinspiresustoreachforourdreams—nomatterhowimpossibletheymayseemtobe!1、Thispassageshouldbe.A．anewsreportB．abiographyC．anintroductionD．abookreview2、Accordingtothepassage,whichwasNOTtrue?A．Susantrieddoingalotofvolunteerwork.B．Susan’smotherexpectedtoomuchoutofher.C．Susan’ssiblingstriedtostopherfromcompetingintheBritain’sGotTalentcontest.D．Susan’sperformanceswerewellreceivedbythecustomersinpubs.3、WhatdoestheauthorthinkofSusanBoyle?A．Pitifulandselfless.B．Shyandpassive.C．Determinedandinspiring.D．Greatandgenerous.24．（8分）Whenyou’rechoosingacollege,alotoffactorsprobablymaybeconsidered:theschool’sreputation,theclassesoffered,andtheprofessorsinyourmajor,tonameafew.However,consideringtheincreasingcompetitivenessofuniversitiestoattractmoreandmoreapplicants,manyschoolsnowofferextrabenefitstobeenjoyedbyalloftheirstudents.Herearesomeofthecoolest:UniversityofMissouriWhenyouthinkofacampusgym,youprobablypicturearoomequippedwitholdweightsandout-of-datemachines.However,attheUniversityofMissouri,youcanenjoyoneofthebestcampusfitnesscentersinthecountry.Itfeaturesan“indoorbeach”completewithawaterfallandalazyriver,aswellasafull-servicespa.Evenifyoudon’tnormallyenjoyworkingout,Missouri’sfitnesscenterwillgiveyouareasontogotothegym.HighPointUniversityIfyouseeyourselfquicklytiredofdininghallfood—somethingthathappenstoalmostallofus—HighPointUniversityinNorthCarolinahasagreatoptionforyou:aprivatesteakhouseforstudents.It’safirst-classrestaurant,and,bestofall,youdon’thavetopayforthemealoutofyourownpocket.Youcanuseyourdiningdollarsinstead.SetonHallUniversityIfyou’restressingoutabouttheextracostoftechnologywhenyoustartcollege,SetonHallhasgreatnewsforyou:allfreshmenaregivenfreelaptopsthroughtheuniversity’sMobileComputingProgram.Asafreshman,you’llreceivealaptopalreadysetupwithallofthesoftwarethatyou’llneedasastudent.Then,aftertwoyears,you’llreceiveanewandupdatedlaptopdesignedtocarrytothroughuntilafteryougraduate.NewYorkUniversityIfyou’reafanofmuseums,NYU(NewYorkUniversity)istheperfectuniversityforyou:notonlyareyoulocatedintheheartofacityfeaturingsomeofthebestmuseumsintheworld,buttheuniversitywillevenprovideyouwithfreeadmissiontomanyofthem.Youcantakeadvantageofvisitingfreemuseumsatanytimeyouwant—andyou’llneverbeboredontheweekends.1、WhatcanwelearnfromParagraph1?A．Itishardtobeadmittedtoauniversity.B．Auniversity’sfameisthetopconsideration.C．Thecompetitiontoattractapplicantsisfierce.D．Extrabenefitsmakesnodifferencetoapplicants.2、WhatcanwelearnaboutthefitnesscenterintheUniversityofMissouri?A．Itsequipmentisoutofdate.B．Itisthebestoneintheworld.C．Ithasarealbeachthere.D．Itcanarousestudents’interestinworkout.3、Whichuniversityoffersextrabenefitoffood?A．UniversityofMissouri. B．HighPointUniversity.C．SetonHallUniversity. D．NewYorkUniversity.4、WhatcanbeguaranteedforstudentschoosingSetonHallUniversity?A．Freetuition. B．Freeaccommodation.C．Freecomputers D．Highgraduationrate.5、WhichofthefollowingistrueofNewYorkUniversity?A．Itislocatedinthecenterofthecity.B．Ithousesthebestmuseumsintheworld.C．Allthemuseumsareopentoitsstudentsforfree.D．Museumsareusuallyclosedontheweekends.25．（10分）Oneofthemainpointsoftravelingistorelaxandtakeabreakfromyournormaldailylife.Butthetruthis,we’renotalwaysfreetodowhatwelikewhentravelingtoaforeigncountry,andaUStouristlearnedthatthehardway.OnAug12,theunnamed41-year-oldmanwasbeatenbyapasserbyafterhewasseengivingNazisalutes(纳粹礼)againandagainonastreetinDresden,Germany.EversincetheendofWorldWarⅡ,GermanyhasstrictlawsforbiddingtheNazisalute,aswellasothersymbolsofNazism.Infact,mostcountrieshavetheirowntaboos(禁忌).Ifyouplantotraveloverseas,it’sbesttogetfamiliarwiththesetaboosbeforeyoustarttouringlocalsites.Herearesomeexamples.SingaporeYoucangetfinedforalotofthingsinSingapore,includingfeedingbirds,spitting(吐痰),smokinginpublic,notflushing(冲)apublictoiletafteryouuseit,andeatingordrinkingonbusesortrains.JapanYou’renotsupposedtowearyourshoesinsomeone’shouse,butyou’renotsupposedtotakeyourshoesoffoutsidethehouseeither.Instead,there’sasmallareainsidethedoorcalleda“genkan”whichiswhereyourshoesshouldgo.Ifyou’restillnotsurewherethatis,payattentiontowhatotherpeopledoanddothesame.FranceFrenchpeopledon’tlikeitwhenyoutalkaboutmoney.It’sOKifyousaythatyouwanttoquitajobbecauseyouaren’tpaidenoughmoney,butyoushouldneversaytheexactamount.Moneyisconsideredtobea“dirty”topicinFrance.1、WhywastheUStouristwasbeateninGermany?A．Hewasbeatenbymistake.B．HewasnotwelcomeinGermany.C．HeactedimproperlyinGermany.D．Hequarraledwithalocalperson.2、Whichstatementistrueaccordingtothepassage?A．EatingordrinkingonbusesisacceptableinSingapore.B．YoushouldtakeyourshoesoffoutsidethehouseinaJapanesehouse.C．YoushouldkeepyourshoesoninaJapanesehouse.D．ItisimpolitetoaskaFranceman’ssalary.3、Whichcolumnisthispassagemostlikelytobetakenfrominanewspaper?A．CampusLifeB．DiscoveryC．ScienceStudyD．StarStories第三部分语言知识运用（共两节）第一节（每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项．26．（30分）阅读下面短文，从短文后各题的A,B,C,D四个选项中，选出合适填入对应空白处的最佳选项，并在答题卡上将该选项涂黑。Agreatmanypeoplearedisappointedbecauseofunrealisticexpectations.Walkinguptoadepartmentstore’sclothcounter,a(n)26youngwomansaid,“Iwanttobuythismaterialforanewdress.Howmuchdoesitcost?”“Onlyone27peryard,”repliedthesmirking(自鸣得意的)maleclerk.Nottobe28backbythefunnywords,thewomansaid,”That’sfine!I’lltaketenyards.”With29writtenalloverhisface,theclerk30measuredoutandwrappedthecloth,thenhelditoutteasingly(戏弄地),31forwardtoreceivehis“32”.Thewomangotthepackagequicklyfromtheclerkand33toalittleoldmanstandingbesideher.“Grandpawillpaythebillinsteadofme,”she34.Hewasno35disappointed.Butinthecourseofliving,manypeopleare36whenothersdonot37theirexpectations.Inordertobehappy,someexpectationsmustbe38.Thesethreeparticular39andunhealthyexpectationsaresomeofthemaincauses:1、Expecttoomuch40.Whenotherssay,“Thankyou,”orinanywaytoshowtheirgratitude,be41.Itisagift!2、Expectotherstomakeyouhappy.Theysimplycannotdothat.Makeyourselfhappyand42yourjoywithothers.3、Expectnottobe43.Attimes,peoplewillsimplynotcomethroughforyouinthewayyouneed.44themandmoveon.Getridofthesethreeunrealisticexpectationsandyoucanbegintoexpectmore45rightaway!4、A．trickyB．attractiveC．ugly D．generous5、A．kissB．payC．dollar D．cent6、A．movedB．forcedC．fought D．taken7、A．happinessB．enjoymentC．expectationD．courage8、A．hurriedlyB．slowly C．patientlyD．curiously9、A．settingB．sitting C．leaningD．taking10、A．rewardB．paymentC．bonusD．money11、A．tendedB．paid C．pointedD．nodded12、A．smiledB．beggedC．wavedD．thought13、A．wonderB．use C．good D．doubt14、A．encouragedB．disappointedC．annoyedD．surprised15、A．liveuptoB．goagainstC．gowithout D．hopefor16、A．setB．made C．dropped D．completed17、A．reasonableB．proper C．unimportant D．unrealistic18、A．profitB．kiss C．appreciationD．disappointment19、A．happyB．sadC．angry D．excited20、A．spareB．shareC．make D．control21、A．putdownB．letdownC．takendown D．throwndown22、A．ForgiveB．PunishC．Blame D．Praise23、A．happinessB．encouragementC．excitementD．pride第二节（每小题1.5分，满分15分）阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。27．（15分）Readthepassageandfillintheblankswithproperwordsortheproperformsofthegivenwords.Apartfromspeeches,inmypointofview,wecanuseoureyestoexpress1．(us).Andthroughone’seyes,wecanreadsorrow,happiness,encouragement,andmanyotheremotions.EvennowIstillrememberanexperience,2．happenedwhenItookpartinasingingcontestattheageofnine.Itwasthepowerofmymother’seyes3．encouragedmetogoforit.Ihadshowngreatinterest4．singingbeforethat,butIwastooshy5．(sing)inpublic.Onedaymymothertookmetosignupforasingingcontest.Withmymother’scompany,Iwasdetermined6．(meet)thatchallenge.Standingonthestage,IsuddenlyfoundI7．(become)thefocusofallattention.IwassonervousthatIcouldn’tevenkeepmyeyesopen.WhenIwasto8．(introduce)totheaudienceandsing,Ibecameevenmorenervous.Ifeltmylegswereshakingandmymemoryseemedtohaveleftme—Icouldn’trememberanything.Searchingforhelp,Isawmymother’seyeswhichweresparkling(闪光)withencouragementandstrongpower.Itseemedthattheywerespeakingtome,“Take9．easy.Youcandoit!I’llalwaysbewithyou!”IreadthemessageinhereyesandatthatmomentIgotmy10．(confident)backandbegantosingmysong.Sometimes,yousee,justalookofencouragementfromabelovedonecanmakeashypersonbrave.第四部分写作（共两节）第一节短文改错（满分10分）28．（10分）假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误,每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。增加：在缺词处加一个漏字符号(∧),并在其下面写出该加的词;删除：把多余的词用斜线(＼)划掉;修改：在错的词下划一横线,并在该词下面写出修改后的词。注意：1、每处错误及其修改均仅限一词;2、只允许修改10处,多者(从第11处起)不计分。Writingwasmyfavoriteclassatschool、Myteacher,BebeUsi,wasdevotingandencouraging、Weeachspentseveralclassesmakeapapermaskandworeitwhenreadingourownworkbeforetheclass、Ihaveforgottenthatcompositionnow,butIrememberthefeelingofmaskonmyfaceandmyheartwasbeatingwildasIsharedmycomposition、Iwasafraidofbutproud、Ihavewrittenmanycompositionsbeforethatbutnoneofwhichhadbeenchosentobereadbeforetheclass、Theyperhapsweren'tthebestcompositionandthemostbeautifulmaskinmyclass、Buttheybothweremy、34第二节书面表达（满分25分）29．（25分）假定你是李华，你的美国笔友Peter正在学习汉语，他对成语“己所不欲，勿施于人”不太理解，发邮件请求帮助。请你回复邮件，内容包括:1.祝贺汉语的进步；2.解释成语的大意；3.学习成语的建议。注意:1.词数100左右；2.可以适当增加细节，以使行文连贯。DearPete:____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________yours，LiHua

参考答案第一部分（共20小题，每小题1.5分，满分30分）1、B2、C3、D4、B5、A6、D7、C8、C9、B10、C11、D12、D13、B14、D15、A16、A17、D18、B19、C20、D第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。21、1、B2、D3、D4、A5、C22、Spaceiswhereourfutureis—tripstotheMoon,Marsandbeyond.Mostpeoplewouldthinkthatasidefromcomets(彗星)andstars,thereislittleelseoutthere.But,sinceourspacejourneystartedwehaveleftsomuchtrash（垃圾）therethatscientistsarenowconcernedthatifwedon'tcleanitup,wemayallbeinmortal（致命的）danger.Thefirstpieceofspacejunkwascreatedin1964,whentheAmericansatelliteVanguardIstoppedoperatingandlostitsconnectionwiththegroundcenter.However,sinceitkeptorbitingaroundtheEarthwithoutanyconsequences,scientistsbecameincreasinglycomfortableabandoning（抛弃）thingsthatnolongerservedanyusefulpurposeinspace.Itisestimated（估计）thattherearenowover500,000piecesofman-madetrashorbitingtheEarthatspeedsofupto17,500milesperhour.Thejunkvariesfromtinypiecesofpaintchippedoffrocketstocameras,hugefueltanks,andevenodditemslikethemillion-dollartoolkitthatastronautHeidemarieStefanyshynPiperlostduringaspacewalk.Themajorproblemwiththespacetrashisthatitmayhitworkingsatellitesanddamagetravelingspacecraft(飞船).Moreover,piecesofjunkmaycollide（碰撞）witheachotherandbreakintopieceswhichfallbacktotheEarth.Toavoidthis,scientistshaveinventedseveralwaysforclearingthesky.Groundstationshavebeenbuilttomonitorlargerpiecesofspacetrashtopreventthemfromcrashingintoworking