安徽省阜阳四中、阜南二中、阜南实验中学三校2025届高三英语第一学期期末复习检测模拟试题含解析

安徽省阜阳四中、阜南二中、阜南实验中学三校2025届高三英语第一学期期末复习检测模拟试题注意事项:1．答题前，考生先将自己的姓名、准考证号码填写清楚，将条形码准确粘贴在条形码区域内。2．答题时请按要求用笔。3．请按照题号顺序在答题卡各题目的答题区域内作答，超出答题区域书写的答案无效；在草稿纸、试卷上答题无效。4．作图可先使用铅笔画出，确定后必须用黑色字迹的签字笔描黑。5．保持卡面清洁，不要折暴、不要弄破、弄皱，不准使用涂改液、修正带、刮纸刀。第一部分（共20小题，每小题1.5分，满分30分）1．We’llgoearly．，wemaynotgetaseat．A．Otherwise B．Meanwhile C．However D．Besides2．AfterreceivingtheOscarforBestSupportingActress,AnneBenedictwentonallthepeoplewhohadhelpedinhercareer.A．tothank B．thankingC．havingthanked D．tohavethanked3．InApril,2009,PresidentHuinspectedthewarshipsinQingdao,____the60thanniversaryofthefoundingofthePLANavy.A．marking B．markedC．havingmarked D．beingmarked4．Why________youchoosetoworkinaremotevillageschoolwhenyoucanownarespectablejobinacity?A．need B．shouldC．must D．will5．—-Whatdifferencewillitmake_____weshallgototheconcertonTuesdayorSaturday?—Theyofferadiscountonweekdays.A．thatB．whenC．ifD．why6．Hotthenightairwas,wesleptdeeplybecauseweweresotiredafterthelongjourney.A．althoughB．whileC．asD．however7．Moreandmorepeopleprefertoliveinthecountryside,_______appealforthemliesinthequietandslow-pacedlife.A．who B．WhichC．whose D．what8．—Sorry,Ididn’thearthedoorbellring.—Yourbell.Perhapsitneedsrepairing.A．neverworked B．isneverworkingC．neverworks D．hadneverworked9．Thecaraccidenthappened_____hiscarwasoutoforder___Ican’tdrive.A．notthat;butthat B．notonly;butalsoC．notbecause;butbecause D．notbecause;butas10．Withthedevelopmentofeconomy，ourincomehasincreased________10%inlessthanayear.A．forB．byC．onD．at11．Wedidhaveaquarrelaboutmoneylastnight，butnowwehavealready_____________.A．takenup B．putupC．madeup D．broughtup12．Thereisapopularview________incitystrangersarelesslikelytohelpanelderlyperson.A．that B．whetherC．why D．how13．Zhouqu,Gansuwasattackedbysuchaterriblemud-rockflowfewresidentshadeverexperiencedbefore.A．as B．which C．where D．that14．Somepeoplecreatejobs,fosterexcitementandbasicallymakethesystemwork.Theyseepossibilities________othersseeonlyproblems.A．that B．what C．which D．where15．Theargumentremainsextremelyheateditisnecessarytofrequentlyupdateteachingmaterial.A．that B．which C．if D．whether16．Istillfindithardtoimaginethatsuchacleverchild__________makesuchafoolishmistake.A．shall B．mustC．can D．should17．Housepricesareusuallymuchhigher________therearesubwaystationsaround.A．where B．unless C．while D．though18．Whydomanystudentssticktoprivatetutoring_____theycouldeasilymastersuchknowledgeatschool?A．unless B．before C．after D．when19．Thisisthefirsttimethatwe________afilminthecinematogetherasafamily.A．see B．hadseenC．saw D．haveseen20．IntermsofMrs.Meng’sbeingarrestedwithoutsolidevidence,thewesternmediahas_____publicattentionawayfromwhereitshouldbe,thatis,theruleoflaw.A．transformedB．shiftedC．attractedD．changed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）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．Howtotakeaplane22．（8分）HereisarecordofthediscussionaboutAI(artificialintelligence)conductedbyseveralscientists.ScientistA:IwouldsaythatwearequitealongwayoffdevelopingtheAI,thoughIdothinkitwillhappenwithinthenextthirtyorfortyyears.Wewillprobablyremainincontroloftechnologyanditwillhelpussolvemanyoftheworld’sproblems.However,noonereallyknowswhatwillhappenifmachinesbecomemoreintelligentthanhumans.Theymayhelpus,ignoreusordestroyus.ItendtobelieveAIwillhaveapositiveinfluenceonourfuturelives,butwhetherthatistruewillbepartlyuptous.ScientistsB:Ihavetoadmitthatthepotentialconsequencesofcreatingsomethingthatcanmatchorgobeyondhumanintelligencefrightenme.Evennow,scientistsareteachingcomputershowtolearnontheirown.Atsomepointinthenearfuture,theirintelligencemaywelltakeoffanddevelopatanever-increasingspeed.Humanbeingsevolvebiologicallyveryslowlyandwecouldbequicklysubstituted.Intheshortterm,thereisthedangerthatrobotswilltakeovermillionsofhumanjobs,creatingalargeunderclassofunemployedpeople.Thiscouldmeanlarge-scalepovertyandsocialunrest.Inthelongtermmachinesmightdecidetheworldwouldbebetterwithouthumans.ScientistsC:I’mamemberofthecampaigntoStopKillerRobots.ForgetthemovieimageofaterrifyingTerminatorstampingonhumanskullsandthinkofwhat’shappeningrightnow:militarymachineslikedrones,gunturretsandsentryrobotsarealreadybeingusedtokillwithverylittlehumaninput.Thenextstepwillbeautonomous“murderbots”followingordersbutfinallydecidingwhotokillontheirown.Itseemscleartomethatthiswouldbeextremelydangerousforhumans.Weneedtobeverycautiousindeedaboutwhatweaskmachinestodo.1、WhatisScientistsBworriedabout?A．AItechnologywilldestroytheearth.B．Computerscan’tthinkbythemselves.C．Robotswilltaketheplaceofhumans.D．Humanswillbeunhappywithoutmachines.2、Whatdoestheunderlinedword“this”inthelastparagraphreferto?A．IlaunchthecampaigntoStopKillerRobots.B．WeforgetthemovieimageofaterrifyingTerminator.C．“Murderbots”can’tdecidebythemselves.D．“Murderbots”willbeagainsthuman’sorders.3、WhichstatementisRIGHTaccordingtotherecord?A．ScientistAthinksAItechnologywillneverdevelop.B．TheemploymentwillbeaffectedbyAItechnologyinthefuture.C．“Murderbots”willfollowtheordersoftheirmanufacturesinthewars.D．AllthethreescientistsagreethatAItechnologywillbenefithumanbeings.4、Whoagree(s)AIhasmorenegativeaspectsthanpositiveaspects?A．ScientistA B．ScientistBC．ScientistsB&C D．ScientistsB&A23．（8分）Whenwasthelasttimeyousentapostcard?TheUK’sfamily-ownedoldestpostcardfirm,whichhasbeenpublishingpostcardsandcalendarssince1880,willclosethisDecember.Thereason?Itsaysinsteadofpenningacard,peopleareputtingphotosuponFacebookorInstagramorusingWhatsApptoshowfriendsaridfamilyathomejusthowmuchfunthey’rehaving.Ifyougetapostcardfromsomeonewho’sawaysomewhere,it’sasmuchthethoughtthatthey’vegonethroughthehassle(麻烦)ofchoosingapostcard,workingoutwheretogetastampfrom,findingapostboxandthenthepostcardmakingthatjourneythroughtoyou.That’sthevalueofthepostcard．Butthattimehasgone．BrothersCharlesandHarrySalmon,thefifthgenerationofthefamilytorunthefirm,saidthepopularityofsocialmediahadhadahugeimpactonthebusiness.Peoplearealsotendingtotakeshorterholidays,meaningtheyarelikelytohavearrivedhomelongbeforetheirpostcards.Asaresultthebusinesswasnolongerviable.“Increasinglychallengingtradingconditionsandchangestothenatureandsizeofthemarketforitspublicationshaveresultedinuncertaintyoverthefutureofitstrade,”thebrotherswroteinalettertosuppliersandnewsagents.Asaresulttheywereannouncingaproposaltowithdrawfrompublishing.Thenumberofpostcardssoldeachyearisreportedtohaveseenasharpdeclinetoaboutfivemillionfrom20millionjust25yearsago.Butthefirmsaidthataswellasthedropinthenumberofpostcardssent.“wehavealsohadtoconsiderthattherearenomoremembersofthefamilywhowishtojointhebusiness."1、Whatisthebesttitleofthetext?A．UK’soldestpostcardfirmsettocloseB．PostcardindustryboominginthefutureC．UK'spostcardfirmthroughatoughtimeD．Postcardindustryneedingsupporttosurvive2、What’sthevalueofsendingapostcard?A．It’sajourneyofloveB．It’sasymbolofsympathyC．It’sanactofpatienceD．It’sawayofpassingtime3、Whatdoestheunderlinedword“viable"inParagraph3probablymean?A．WorthofpraiseB．PossibletochangeC．ShortofmoneyD．likelytoexist4、Wheredoesthistextprobablycomefrom?A．AbusinesscolumnB．AfinancereportC．Ahi-techadvertisementD．Abookreview24．（8分）Foryournextout-of-this-worldvacation,younowhavetheoptionofliterallygoingoutofthisworld—butit’llcostyou$40million.Thenagain,canyoureallyputapricetagonhavingthetimeofyourlife?AccordingtoanewreportfromPopularMechanics,Russiaislookingtobuildaluxuryhotelinouterspace.Thereyouwillwakeuptoabreathtakingblueplanet—theearth!ThehotelisexpectedtobestationedontheInternationalSpaceStation(ISS).Whilespacetourismitselfisn’texactlyanovelidea,thenotionofbuildingahotelouttherehasn’tbeenraisedbefore.Really,othercompaniesarestillfocusedonthetransportationpartofthepuzzle—afterall,atriptospaceisenoughformostfolks.AccordingtoPopularMechanics,thehotelwillincludealuxuryorbitalsuitewithbigwindows,personalhygiene(卫生)facilities,exerciseequipment,andyes,WiFi.Becauseifyoucan’tshareyourexperienceonsocialmedia,diditreallyevenhappen?Ofcourse,thereasonsbehindthehotelaren’tjustforfunandgames.Apparently,spacetourismmightbeabletohelptheRussianspayforanothermoduletoaddtotheinternationalSpaceStation.RussianspacecontractorRKKEnergiaiscurrentlybuildingthefirstsuchmodule,whichwillgivescientistsalaboratoryandpowersupplystationfromwhichtoconducttests.Ifanyofthisisgoingtohappen,however,Russiaisgoingtohavetohurry.WiththeISSexpectedtobeoutofusein2028,there’slittletimetobuildthehotelandfindwealthytouriststoactuallybuyatripintoouterspace.Soifyou’verecentlycomeintoafortuneandareinterestedininvestinginwhatcouldbethetimeofyourlife,ISSiscallingyourname.1、Whatdoweknowaboutthehotelfromthefirstparagraph?A．Itisquiteaffordable.B．ItwillbebuiltinRussia.C．Itwillofferanamazingview.D．Itcosts$40milliontobuild.2、Whatdoestheunderlinedphrase“thepuzzle”inParagraph2referto?A．Anorbitalsuite.B．Spacetourism.C．Spaceexploration.D．Acreativeidea.3、WhatcanbeinferredfromParagraph3?A．Hotelguestswon’tbeabletoseeintospace.B．Visitorsarerequiredtotakeexerciseeachday.C．SpacetravelisnotpossiblewithouttheInternet.D．Touriststendtosharetravelingexperiencesonline.4、ThehotelwillbebuilttoprovideRussianscientistswithA．funandgamesB．financialsupportC．spacecontractorsD．moretimeinspace25．（10分）Bikingalongthebeach.Workingonapuzzlewiththefamily.Readingonthecouch.Theseapparentlyordinaryactivitiesaren’tjusttime-killers—theycanbelifesavers.Studiesshowthathobbieshavelong-lastingandpreventativeresults.Peoplewhoplaypuzzlegamesandreadhavelessmemorylosswhentheygetolder.“Areallygoodhobbytotallyabsorbsus,”saysGailMcMeekin.“Italsogivesussomethingtolookforwardtoandfocuson.”Thatbreakfromeverydaysadnessisperfectforapersonwhojuggleswithcareersandfamilylife.Havingahobbymakesthatheavyloadalittleeasier,asitsetsasidetimeforbothamentalbreakandfocusesonanactivitythepersonloves,onethatisseparatefromofficeandparentalduties.“It’sverysadwhenIseeclients(当事人)whohavebeenlaidoffshowthatworkwasthecentreoftheirlivesandtheyhavenohobbiestoturntoforsupport,”Gailsays.“Entertainmentgivesusrestandafreshperspective,”saysGall,whonotesthatlotsofcreativeideasappearwhenpeopletakeabreakandlistentotheirintuition(直觉).Danielle,blogger,madeherblogginghobbyacareerafewyearsago,andinthemeantimefoundahobbysheneverexpectedtogetinto:clothingdesign.“Havingahobby,especiallyacreativeone,haspositivelyimpactednotonlymyworklife,butmypersonallifeaswell,”Daniellesays.“Thetrick,”shesays,istofindoutwhereyouarespendingtimedoingthingsthataren’tfulfillingtoyouandtakethattimetodosomethingyouloveinstead.”“Learntobeanexpertpublicspeakersoyoucangivebetterpresentationsatwork;startascrapbooking(剪贴本)withyourkidssoyoucanspendtimewiththemandbecreative...”Danielleoffers.Gailalsosuggestsdevelopingahobbythatpromotessocializationwithfriends.Thisisanopportunitytobecomepartofapowerfulsupportsystem,whichisimportantforemotionalhealth.Attheveryleast,it’sagoodwaytochatwithagolffriendwhilewalkingthecourseandforgettingalongdayatwork.1、WhatdotheunderlinedwordsinParagraph2mean?A．Quitone’scareertopursueone’shobby.B．Struggletoabalancebetweenworkandfamily.C．Preventusfromtakingupourhobby.D．Attachmoreimportancetoworkthanfamily.2、WhatdoweknowaboutDanielle?A．Shemakesalivingbywritingblogs.B．Designingclothesishercareer.C．Shesupportsherfamilybybeingapublicspeaker.D．Shespendstimedoingwhatshehasnointerestin.3、Whatdoesthelastparagraphimply?A．Itsourresponsibilitytosocializewithothers.B．Developingahobbyisveryimportant.C．Ourfeelingsaredeterminedbyourhobbies.D．Webenefitfromahobbyoftalkingwithothers.4、Accordingtothepassage,thebenefitahobbybringsisthat.A．wecanconcentratemoreonourjobsB．wecanenjoyourselvesinthewildC．wecanthinkinamorecreativewayD．wecanavoidbeinglaidoff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）What'sallthistree--plantingfor?"IwasaskedwhenIbeganwritingabout1apieceoflandIhadboughtinSomerset.Thetruthis,Ijustlovetrees.AndIamnot2AsIgetolder,allIreally3istoplanttrees,PrinceCharlessaysinaBBCdocumentaryinwhichheis4inthewoodheplantedonthedayPrinceGeorgewasborn.Thereare5andwonderfultreesinourcitiesandvillages.Theywereplanted,orself-sown,years,evencenturiesago.Wetakethemforgranted,6thecreatureslivingamongthem,remaininignoranceofthe7treesaredoingus(cleaningtheair,forinstance)andcutthemdownfornew8.Yetwekeepafeelingof9forthem.Thismayaccountforthe10thegovernmentfacedin2010whenitsoughttoselloffpubliclyownedwoods,andforthewidesupportthattheWoodlandTrust(atree-protectingcharity)11.Treesneed12,whichiswhyI,acity-resident,boughtmySomersetwoodlandin1999.Atthattime,climatechangewasalreadywellproved,13myhopesofplantinglong-livedoaksandpinesgraduallydevelopedintoanxietyabouttheir14.TreediseasesnewtotheUK,wind,droughtandfloodwereall15againstthem.ButIdidnot16thingstomovesofast.Thewoodlandisstillgood,thenewtreesaregrowinglikemad,butthecreaturesare17.Therabbitshavedisappearedandtheowlhasmoved.Thebeesandbutterfliesare18therebutinsmallernumbers.Howcanthishappenonland19pesticides(杀虫剂)？Surely,itindicatesweneedtogivenaturethechancetorestoreitsown20.Meanwhile,Ilovemywood,andsodomanyofitsvisitors.Andtree-plantinghasdonewondersforrestoringmybalancetownandcountry.1、A．replacing B．restoring C．recycling D．returning2、A．rich B．weak C．alone D．social3、A．applyfor B．waitfor C．makefor D．longfor4、A．filmed B．tracked C．reflected D．discovered5、A．holy B．young C．mature D．mysterious6、A．raise B．watch C．ignore D．abuse7、A．honor B．good C．credit D．justice8、A．use B．spirit C．life D．hope9、A．trust B．sadness C．betrayal D．affection10、A．approval B．opposition C．option D．dilemma11、A．wins B．rejects C．requires D．withdraws12、A．space B．time C．company D．nutrition13、A．since B．for C．yet D．so14、A．benefits B．chances C．location D．appearance15、A．pilingup B．speedingup C．keepingup D．mixingup16、A．wish B．intend C．allow D．expect17、A．inplace B．inorder C．indecline D．inquestion18、A．even B．still C．ever D．once19、A．shortof B．sickof C．freeof D．fullof20、A．glory B．function C．impact D．balance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）Asmoreandmorepeopleliketotravel,independently,minsuhavegrowninpopularity,withhomestaysofferingtouriststheopportunity1．(experience)locallifestyles.2．Aug1,2017,Beijingintroducedanewtourismregulationtoimprovetheoperationandmanagementofminsu.Theregulation3．(state)thatthecityanddistrictgovernmentsshouldguidethedevelopmentofminsuandencouragethedevelopmentinsuburbanareas.Shoppingduringtripsshould4．(manage)aswellwiththecityanddistrictgovernmentsshoulderingtheirresponsibilities.“Thenewregulationencouragespeopletooperateminsuandservetheirguests5．(proper),”saidCuiZhaohai,29,anownerofaminsuindowntownBeijing.“Iachieveastrongsenseofaccomplishmentbychanginganoldcourtyardintoawell-decoratedminsuandatthesametimeitallowsmetoprotecttheoldarchitecture.”ChenXiao,30,atourist6．(stay)inaminsuinLijiang,Yunnanprovincethoughthighlyofminsu,“The7．(operate)areoftenfriendlyandit’salsoconvenienttofindothertourists,8．wanttocarpoolortraveltogethertocutcost.”AccordingtoWang,9．officialfromBeijinggovernment’slawdepartment,thecitygovernmentshouldreleasemoredetailedregulationsaboutminsuinBeijing’surbanandruralareano10．(late)thanAug1,2018.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，错误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。LastSaturdayIwentcampingwithseveralfriends、Inthelaterafternoon,weputupourtentinthemiddleofafield,Thenwecookedamealoveranopenfire、Thefoodsmeltgood、Afterameal,wetoldstoryandplayedgamesbythecampfire、Attheeleveno’clockwefelttiredbutweputoutthefireandgotintoourtent,Lieinourwarmsleeping-bagswesleptsoundly、Atmidnightoneboywokeupandbeganshouting、Thetentwasfullwater!Wegotoutofoursleeping-bagsandhurriedoutside、Itwasrainingheavy、Astreamhadformedinthefield,thatwounditswayacrossthefieldandflowunderourtent第二节书面表达（满分25分）29．（25分）假设你是李华，你所在的学校篮球队正在招收新队员，请用英文给你的留学生朋友Jim写封电子邮件邀请他加入。要点如下:加入球队的好处；报名方式:发送邮件至team@163.com；截止日期:10月25日。注意:词数100左右；可以适当增加细节，以使行文连贯；recruitvt.招收DearJim,______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Yourstruly,LiHua

参考答案第一部分（共20小题，每小题1.5分，满分30分）1、A2、A3、A4、C5、C6、C7、C8、C9、C10、B11、C12、A13、A14、D15、D16、D17、A18、D19、D20、B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、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.Themajorproblem