安徽省無為縣中學2025屆高三二診模擬考試英語試卷含解析

安徽省無為縣中學2025屆高三二診模擬考試英語試卷注意事項1．考試結(jié)束后，請將本試卷和答題卡一并交回．2．答題前，請務必將自己的姓名、準考證號用0．5毫米黑色墨水的簽字筆填寫在試卷及答題卡的規(guī)定位置．3．請認真核對監(jiān)考員在答題卡上所粘貼的條形碼上的姓名、準考證號與本人是否相符．4．作答選擇題，必須用2B鉛筆將答題卡上對應選項的方框涂滿、涂黑；如需改動，請用橡皮擦干凈后，再選涂其他答案．作答非選擇題，必須用05毫米黑色墨水的簽字筆在答題卡上的指定位置作答，在其他位置作答一律無效．5．如需作圖，須用2B鉛筆繪、寫清楚，線條、符號等須加黑、加粗．第一部分（共20小題，每小題1.5分，滿分30分）1．Shewasina________conditionafterthehearttransplantoperationwhenherbodyrejectedtheforeignorgan.A．skeptical B．critical C．theoretical D．practical2．foryearsofhardtraining,shewouldnotbestandingonthestage,receivinghugecheersandapplause.A．Itwerenot B．IthadnotbeenC．Wereitnot D．Haditnotbeen.3．TheBrownsheld_______theycalled“familyday”onceeachyear.A．that B．what C．which D．when4．AsurveysuggeststhattheroyalweddingofPrinceWilliamandKateMiddleton_____agreatboostforBritisheconomybecausealargenumberofvisitorsareexpectedtogo.A．willbe B．hasbeen C．was D．be5．—Iamsearchingoneonlineshoppingsiteafteranotherforacomputer.—So__________IbeforeIdecidedtobuyanewcamera.A．had B．have C．a(chǎn)m D．would6．Pleasecallmysecretarytoarrangeameetingthisafternoon，or____________itisconvenienttoyou.A．wherever B．howeverC．whichever D．whenever7．Nineintenparentssaidthereweresignificantdifferencesintheirapproachtoeducatingtheirchildrencomparedwith________oftheirparents.A．thoseB．oneC．thatD．it8．Whentheorganization______inMarch,2019,therewasalmostnomoneyinthebankandmorethan$1millionofdebt.A．folded B．boomed C．registered D．sprang9．Oneofthetruetestsofleadershipistheabilitytorecognizeaproblem________itbecomesanemergency.A．when B．beforeC．a(chǎn)fter D．unless10．ThismorningIpickedupwalletinsurpriseonmywaytoschool.A．A;a B．the;a C．a(chǎn);\ D．\;the11．—CanIhaveadayofftomorrow?Ineedtovisitmygrandmainthehospital.—__________.Icanmanagewithoutyou.A．ForgetitB．OfcourseC．ItdependsD．I’mafraidnot12．MorethanaquarteroftheenergyintheUnitedStatesgoestomovingpeopleandgoodsfromoneplacetoanother.A．using B．used C．touse D．use13．Itwasannouncedthatonlywhenthefirewasundercontrol__________toreturntotheirhomes.A．theresidentswouldbepermittedB．hadtheresidentsbeenpermittedC．wouldtheresidentsbepermittedD．theresidentshadbeenpermitted14．Thepresidentstoodbyawindowinsidetheroom,________Ientered,lookingoverthesquare.A．where B．intowhichC．which D．that15．Sometourists’visitingTian’anmenSquareduringtheholidaylefta__________oflittereverywheretheywent.A．trail B．dotC．chain D．track16．Mysister______thebabywhileI’matyoga.A．a(chǎn)rrangesB．mindsC．a(chǎn)ssesses17．Aftersevenhours’drive,theyreached______theythoughtwastheplacetheyhadbeendreamingof.A．that B．whatC．where D．which18．Studentsarealwaysinterestedinfindingout_______theycangowithanewteacher.A．howfar B．howsoon C．howoften D．howlong19．Thankstoherdeterminationandperseveranceonthepianolesson,shehasa______graspofthesubject.A．comprehensive B．confidentialC．conservative D．compulsory20．Theteacherspokesofastthatitwashardforthestudentsto______whathewassaying.A．takein B．takeoff C．takeon D．takeafter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四個選項中，選出最佳選項。21．（6分）Oneofthestatementsthatmanyexpertsseemtoagreeonisthefactthatthegreatthingsstartstohappentheminuteyoustepoutsideofyourcomfortzones.Assoonasyoudecidethatyouarewillingtogobeyondwhatissafe,thepossibilitiesareendless.Forme,oneofthemostimportantthingsthatweshouldalwayskeepinmindisthefactthatgrowthandcomfortcan’tcoexist.PersonaldevelopmentauthorNapoleonHilloncesaid:“Whateverthemindcanunderstandandbelieve,themindcanachieve.Regardlessofhowmanytimesyoumayhavefailedinthepastorhowlofty(崇高的)youraimsandhopesmaybe.”Thisstatementisespeciallypowerfulbecauseitremindsusthatwearetheonlyoneswhocanberesponsibleforhowfarwewillgo.However,steppingoutsideofourcomfortzoneisprobablythemostimportantsteptoexperiencingrealchange.Foralongtime,IknewthatIwantedtoliveinArgentina,sohalfwaythroughmybachelor’sdegree,Iboughtaone-wayticketthere.WhileinArgentina,Ifinishedthelasttwoyearsofmydegreeonlinebeforeflyingbackhomeforgraduation.IcurrentlystillliveinArgentina,andIcanproudlysaythattakingthenecessarystepstomakeitarealitywasoneofthemostimportantthingsIcouldhavedone.This,ofcourse,bynomeansatallappliestoeveryone,andI’mnotimplyingweshouldallbuyone-wayticketstoforeigncountriesandseewhathappens.Butit’simportanttoknowthatweshouldrecognizewhatwedesireandtrytobringourdreamstolife.Livinginacomfortzonecantrickusintobelievingthatwehaveanabundantamountoftimewhen,inreality,weallknowthatyearscanflybywithoutushavingaccomplishedmuchofwhatwereallywantedtodo.Sowhywait?I’mthankfulthatIdidn’tputoffmymoveuntilalaterdatebecauseIwouldhavemissedoutonalotofamazinglifeexperiencesthathaveshapedmeasaperson.Ifwewanttoexperienceevenasmallamountofchange,wewillhavetostepoutsideofit.1、Whydopeoplepreferstayingincomfortzone?A．Itmakespeoplefeelsafe.B．Itleadstogreatthings.C．Itisimportantforgrowth.D．Ithelpsmakewisedecisions.2、WhatdoesNapoleonHill’sstatementmean?A．Timeandtidewaitfornoman.B．Thehigheryoufly,theharderyoufail.C．Failureisthemotherofsuccess.D．Nothingisimpossibletoawillingheart.3、Whichmattersmosttotheauthorinhis/herstory?A．MovingtoArgentina.B．Gettingthebachelor’sdegree.C．Studyingonline.D．Flyingbackforgraduation.4、Theauthorusedhis/herstoryto________.A．persuadeotherstofollowhis/herexampleB．encourageotherstotakeimmediateactionC．informpeopleofdifferentforeigncultureD．remindpeopletobethankfulinlife5、Whichonecouldbethebesttitle?A．Identifyyourcomfortzone.B．Valueyourprecioustime.C．Alwaystrysomethingnew.D．Makethebestdecisions.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（簡報）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．Howtotakeaplane23．（8分）Spotifycantellifyou'resad.Here'swhythatshouldscareyou.Wanttofigureoutifsomeoneisapatientwithamentaldisability:Askthemwhattheirfavoritesongis.ANewYorkUniversitystudylastyearfoundthatpeoplewholovedEminem'sLoseYourselfandJustinBieber'sWhatDoYouMean?weremorelikelytohavetroublewithmentaldisabilitiesthanpeoplewhowereintoDireStraits.Overthepastfewyears,Spotifyhasbeenimprovingtheabilitytoanalyzeinformationtohelpbusinessmentargetconsumerswithadvertisementsmadespeciallyfortheirneeds.Theyconcludethisfromthesortofmusicyou'relisteningto,combinedwithwhereandwhenyou'relisteningtoit,alongwiththird-partydatathatmightbeavailable.Now,tobeclear,there'snothingsignificantlyillegalaboutwhatSpotifyisdoingwithyourinformation.Icertainlydon'tthinkthattheyareworkingwithshadowyconsultingfirmstoserveyouadssellingaculturestrugglewhileyou'relisteningtomusicthatsuggestsyoumightbeinaterriblesituation.However,Ifinditdisappointingthatourpersonal,privatemomentswithmusicareincreasinglybeingturnedintoinformationpointsandofferedtoadvertisers.Youcanseewherethiscouldgo,can'tyou?Asadtargetinggetsevermoreaccurate,businessmenwillhavetheabilitytotargetourfeelingsinpotentiallyimproperways.Accordingtoonestudy,youaremorelikelytospendmoreonaproductifyou'refeelingsad.Youcanimaginesomecompaniesmighttakeadvantageofthat.Andonthatnote,I'mfeelingalittledownaboutallthis.Headofftotreatmyselftosomethingexpensive.1、What'sthepurposeofthefirstparagraph?A．Tointroduceanewsong. B．Todrawreaders'attention.C．Tohelpmorepatients. D．Topromoteanewmedium.2、Spotifyimprovesitsabilitytoanalyzeinformationto.A．provideservicesforthegovernment B．workwithshadowyconsultingfirmsC．getlisteners'personalinformation D．helpbusinessmenattractconsumers3、What'stheauthor'sattitudetowardsSpotify?A．Uncertain. B．Supportive. C．Positive. D．Dissatisfied.4、Whoisthetextprobablydesignedfor?A．Internetusers. B．Officials. C．Researchers. D．Managers.24．（8分）Mymotivationforstartingourfamilytraditionofreadinginthecarwaspurelyselfish:IcouldnotbearlisteningtoASesameStreetChristmasforanother10hours.Mythreechildrenhadbeenaddictedtothiscassetteonourprevioussummer’sroadtrip.AsIbegantoprepareforournext500-milecartrip,IcameacrossabookJimTrelease’sTheReadAloudHandbook.Thiscouldbetheanswertomyproblem.Ithought.SoIputRoalddahl’sJamesandtheGiantPeachintomybag.WhenIbegantoreadaloudthetaleoftheboywhoescapesthebadguysbyhidinginsideagiantpeach,mythreekidsarguedandwrestledintheirseats.Butafterseverallines,theywereattractedintotherhythmofthewordsandbegantolisten.Wesoonlearnedthatthesimplepleasureoflisteningtoawell-writtenbookmakesthelongmilespassmorequickly.Sometimesthebookswereadbecamehighlightsofthetrip.IreadWilsonRawls’sSummeroftheMonkeysaswespenttwodaysdrivingtothebeach.Wearrivedjustbehindthepowercrewsrestoring(恢復)electricityafteratropicalstorm.Theraincontinuedmostoftheweek,andthebeachwascoveredwithoilwashedupbythestorm.Whenwereturnedhome,Iaskedmysonwhathelikedaboutthetrip.Heansweredwithouthesitation,“Thebookyoureadinthecar.”Roadtripsstillofferchallenges,eventhoughmychildrennowareteenagers.Butwecontinuetoreadaswerollacrossthecountry.AndI'mbeginningtoseethatreadingaloudhasdonemorethanhelppassthetime.Foratleastalittlewhile,wearenotshutinourownelectronicworlds.Andmaybewe’vestartedsomethingthatwillpassontothenextgeneration.1、Whydidtheauthorstartreadinginthecar?A．Shewantedtohaveabetterjourney. B．ShewantedtokeepafamilytraditionC．Herchildrenwereaddictedtomusic. D．Shewantedtokillthetime.2、Howdidthechildrenreactaftertheauthorreadafewlines?A．Theykeptquarrelling. B．Theyhidthemselves.C．Theysoonsettleddown. D．Theycontinuedtofightintheirseats.3、Whatcanwelearnabouttheauthorandherfamily’striptothebeach?A．Theywerecaughtinastorm. B．Theyenjoyedreadingontheroad.C．Theyhadagoodtimeonthebeach. D．Theythoughtithadpassedtooquickly.4、Whichcanbethebesttitleforthetext?A．BetterReadingthanTraveling B．BooksthatChangedMyChildrenC．RoadTripsFullofChallenges D．ReadingMakesGreatRoadTrips25．（10分）‘Turtletime!,loudlycalledoutbyoneofmynewly-foundfriends,meantthebeginningofeitheramorningorafternoonshiftatTurtleCampinNusaPenida,Indonesia.Uponarrivalattheprojecteachday,wewouldlookeagerlyforournamesonthewhiteboardtoseewhichtaskwewouldbeundertaking.Woulditbethehighlydesirable‘turtlefeeding’,theprettyfun‘tankcleaning’,theexciting‘medicineadministering’orthelessappealing‘fishcutting’?FineintheorybutnotwheneveryflyinIndonesiadecidestocrowdontothesedeadfishwhileyou’recutting!Lifeattheturtleprojectwasfunbecausetwiceadaywegottohangoutwithseaturtles.By‘hangout’,Iobviouslymeant‘work’,aswewereonshift,butitcertainlydidn’tfeellikework.Anotherfunthingwasgettingtoknowtheothervolunteers!Withvolunteersfromallovertheworld,itwasjustcommontohearFinnishbeingspoken,AustralianslangmixedwithFrenchexpressionsandSwedesmakingplanstovisitnewly-foundfriendsintheUSA．Ofcourse,notallthetimeatTurtleCampwasconsumedbyvolunteering.ScheduledactivitiesincludedatriptoCrystalBay,abeautifulparadiseforswimmingandsunbathing,anawesomebeachbonfirecompletewithabeautifulsunsetaswellasourlocalcoworkersshowingofftheirguitarplayingandsingingskills.OurtimeatTurtleCampwascappedoffbysettingfreetwoofourturtlesintotheseatobegintheirjourneyasindependentturtles!Hopefully,theloveandcareprovidedattheturtleprojectwouldensurethattheseturtleshadagreaterchanceofsurvivalinthebig,wideandscaryocean.1、WhichtaskislessfuntothevolunteersatTurtleCamp?A．Turtlefeeding. B．Tankcleaning.C．MedicineAdministering. D．FishCutting.2、Whatdoestheunderlinedsentenceimply?A．Thevolunteeringwasachallenge.B．Thetimeatthecampwasdifficult.C．Theworkattheprojectwasadelight.D．Communicationwastime-consuming.3、Whensettingfreethetwoturtles,thevolunteersfeltasenseof_________.A．a(chǎn)chievement B．belongingC．loss D．independence第三部分語言知識運用（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四個選項中，選出可以填入空白處的最佳選項．26．（30分）IhadstoppedtogetgasataplacewhereIalmostnevergo.Ihad1aboutcleaningmywindshield(擋風玻璃).Butthenwhenthegas2wasalmostfinished,Idecidedforsomereasonto3andcleanit.That'swhatIwasdoingwhenawomanapproachedmeandaskedfor4.Thereweretwowomen,onemiddleaged,theothertwenty-something，5ayoungchildinthebackseat.Onadaywhenthetemperaturewaswellpast100,theywere6inanoldcarwithnoairconditioning,drivingfromatownaboutanhouraway."CanyoutellushowtogettoMopac,sir?"Shehadafolded-upprintoutofdirectionsfromGooglemaps."Sure.WhereonMopacareyou7？"Iasked.Sheunfoldedtheprintoutandshowedmethe8.Iknewitwell,andstartedtogetthe9thatthismomentwasmeanttohappen."Iknow10wherethatis."Itoldher."Iusedtohavea(n)11inthatbuildingtoworkin."I12givingdirectionstotheolderlady,andthenagaintoher13,whowasthedriver.Ittookawhile,becauseI14eachinstructiontomakesuretheyunderstood.Inasinceremomentof15,theolderladythankedme.Thewhole16helpedmemuchmorethanithelpedher.Ihadbeenhavingavery17day.Infact,theonlyreasonIhadgonetothatparticulargasstationwasthatIwantedtotakealittledriveand18myhead.AsIreplacedthegascap,havingsentthemontheirway,Isuddenly19thatIfeltbetter.Myheadwasclear.AndIam20fortherealgoodnessitbroughtintomylife.1、A．cared B．hesitated C．worried D．complained2、A．making B．leaking C．burning D．pumping3、A．goahead B．giveup C．setoff D．hurryup4、A．gas B．coins C．directions D．food5、A．upon B．with C．except D．beyond6、A．starving B．sheltering C．traveling D．hiding7、A．lost B．a(chǎn)rranged C．located D．headed8、A．distance B．line C．sign D．a(chǎn)ddress9、A．feeling B．evidence C．reward D．pleasure10、A．generally B．exactly C．wholly D．personally11、A．destination B．field C．office D．a(chǎn)partment12、A．thoughtof B．putoff C．turnedto D．endedup13、A．companion B．passenger C．helper D．colleague14、A．explained B．repeated C．demonstrated D．recalled15、A．silence B．coldness C．a(chǎn)ppreciation D．embarrassment16、A．situation B．a(chǎn)ccident C．conversation D．incident17、A．meaningful B．fortunate C．important D．difficult18、A．clear. B．empty C．cover D．turn19、A．understood B．realized C．a(chǎn)cknowledged D．a(chǎn)ssume20、A．a(chǎn)nxious. B．fit C．ready D．grateful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個適當?shù)膯卧~或括號內(nèi)單詞的正確形式。27．（15分）YuanLongpingwasbornin1930.SincehegraduatedfromSouthwestAgriculturalCollegein1953,he1．(devote)hislifetofindingways2．(grow)moreandmorerice.Asayoungman,hesawthegreatneedforincreasingthericeoutput.Atthattime3．(hungry)wasaseriousprobleminmanypartsofthecountryside.Yuansearched4．a(chǎn)waytoincreasericeharvestswithout5．(expand)theareasofthefields.In1950,Chinesefarmerscouldproduceabout56milliontonsofrice.In6．recentharvest,however,nearly200milliontonsofricewereproduced.Theseincreasedharvestsmeanthat22%oftheworld’speople7．(feed)fromjust7%ofthefarmlandintheworld.YuanLongPingisnowcirculatinghisknowledgeinIndiaandmanyotherless8．(develop)countriestoincreasetheirriceharvests.9．(thank)tohisresearch,theUNistryingtoridtheworld10．hunger.Usinghishybridrice,farmersareproducingharveststwiceaslargeasbefore.第四部分寫作（共兩節(jié)）第一節(jié)短文改錯（滿分10分）28．（10分）假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌寫的以下作文。文中共有10處語言錯誤，每句中最多有兩處。錯誤僅涉及一個單詞的增加、刪除或修改。增加：在缺詞處加一個漏字符號(∧)，并在其下面寫出該加的詞。刪除：把多余的詞用(＼)劃掉。修改：在錯的詞下畫一橫線，并在該詞下面寫出修改后的詞。注意：1、每處錯誤及其修改均僅限一詞；2、只允許修改10處，多者（從第11處起）不計分。Iusedtothinkcooperatingwasteoftime,butonethingchangesmymind．Onedaythescientificteacheraskedustodosomeresearchesandhandedintheconclusion．ThattookmelotsoftimetodotheresearchbutIstillcouldn’tfinishedit．SoItriedtocooperatewithothers．Wesharedourresearchesandthenmadethecompletelyconclusionsoon．SoIthinkcooperatingnotonlysavesourtimes,butalsohelpsustopromotethecommunicationwithothers．Althoughintheworldtodayveryfewthingscanbesuccessfullydonebyjustoneperson,cooperatingcanbenefitfrombothorallsides．47第二節(jié)書面表達（滿分25分）29．（25分）共享單車（sharing

bikes）的出現(xiàn)，為大家?guī)砹朔奖悖瑫r，也反映出一些問題．例如，隨意停放，影響行人通行；故意破壞車輛，造成維護成本增加，并影響他人正常使用，等等．請針對此現(xiàn)象，寫一封倡議書，號召大家文明用車．要點提示：1、共享單車的好處；2、使用過程中出規(guī)的問題；3、如何做到文明用車．寫作要求：1、文章要涵蓋上述要點，并適當增加細節(jié)．2、字數(shù)：不少于100字．______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

參考答案第一部分（共20小題，每小題1.5分，滿分30分）1、B2、D3、B4、A5、A6、D7、C8、A9、B10、C11、B12、B13、C14、C15、A16、B17、B18、A19、A20、A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四個選項中，選出最佳選項。21、1、A2、D3、A4、B5、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（拋棄）thingsthatnolongerservedanyusefulpurposeinspace.Itisestimated（估計）thattherearenowover500,000piecesofman-madetrashorbitingtheEarthatspeedsofupto17,500milesperhour.Thejunkvariesfromtinypiecesofpaintchippedoffrocketstocameras,hugefueltanks,andevenodditemslikethemillion-dollartoolkitthatastronautHeidemarieStefanyshynPiperlostduringaspacewalk.Themajorproblemwiththespacetrashisthatitmayhitworkingsatellitesanddamagetravelingspacecraft(飛船).Moreover,piecesofjunkmaycollide（碰撞）witheachotherandbreakintopieceswhichfallbacktotheEarth.Toavoidthis,scientistshaveinventedseveralwaysforclearingthesky.Groundstationshavebeenbuilttomonitorlargerpiecesofspacetrashtopreventthemfromcrashingintoworkingsatellitesorspaceshuttles.Futur