四川省眉山市仁壽第一中學高三第一次調研測試新高考英語試卷及答案解析

四川省眉山市仁壽第一中學高三第一次調研測試新高考英語試卷考生請注意：1．答題前請將考場、試室號、座位號、考生號、姓名寫在試卷密封線內，不得在試卷上作任何標記。2．第一部分選擇題每小題選出答案后，需將答案寫在試卷指定的括號內，第二部分非選擇題答案寫在試卷題目指定的位置上。3．考生必須保證答題卡的整潔?？荚嚱Y束后，請將本試卷和答題卡一并交回。第一部分（共20小題，每小題1.5分，滿分30分）1．Theydon’tfeelsafeinourtownatnightbecauseitsodangerous.There’sarobberyeveryweeknow.A．becomes B．became C．hasbecome D．hadbecome2．—Comeon,pleasegivemesomeideasabouttheproject.—Sorry.Withsomuchwork_______mymind,Ialmostbreakdown.A．filledB．fillingC．tofillD．beingfilled3．—Thankyouverymuchforeverything．You'vebeensohelpful.—__．JustletmeknowifthereisanythingelseIcandoforyou． A．Withpleasure B．Thepleasureismine． C．Pleasedon'tsayso D．No,thanks4．---TurnofftheTV,Jack.Yourhomeworknow?---Mum,justtenmoreminutes,please.A．ShouldyoubedoingB．Couldn’tyoubedoingC．Shouldn’tyoubedoingD．Willyoubedoing5．AgrandbanquetwasheldbyElizabethII_____PresidentXi’scurrentstatevisittotheUK.A．intermsofB．inhonorofC．infavorofD．inmemoryof6．Mollyfinallyagreed,_____reluctantly,togoandseeadoctor.A．afterwards B．almostC．otherwise D．somewhat7．Jane’spalefacesuggestedthatshe______illandherparentssuggestedthatshe______amedicalexam.A．be;shouldhave B．was;haveC．shouldbe;had D．was;had8．It’sdifficultforustolearnalessoninlife________we’veactuallyhadthatlesson.A．whileB．sinceC．untilD．when9．Iregretnothavingtakenyouradvice.OtherwiseI________thismistakeatthemoment.A．didn’tmake B．wouldn’tmakeC．hadn’tmake D．wouldn’thavemade10．Heisabad-temperedfellow,buthe________bequitecharmingwhenhewishes.A．shall B．shouldC．can D．must11．Whilewewerelisteningtothespeechattentively,avoice_____toannouncetheresultoftheelection.A．brokein B．brokeup C．brokeoff D．brokedown12．Wearetoholdthesportsmeetingnextweekend,________theairqualitybecomesbetter.A．which B．whenC．where D．while13．Iwantedtogiveyousomebread,but________wasleft.A．neither B．nothingC．none D．noone14．______tonuclearradiation,evenforashorttime,mayinfluencegenesinhumanbodies.A．Havingexposed B．BeingexposedC．Toexpose D．Exposed15．—Sorry,sir.I______followyou.Wouldyoupleasespeakslower?—Ok.A．can’t B．mustn’t C．shouldn’t D．needn’t16．I'veheardthatpreparations______forthecomingfestival.Let'sgivethemahand.A．arebeingmade B．havebeenmadeC．aremaking D．havemade17．Itgivesusgreatdelight______Chinesesciencefictionsarebecomingincreasinglypopular.A．how B．whatC．that D．why18．Theeventthat_________inmymemoryhappenedonemorningin1983whenIwas14yearsold.Ithasneverescaped.A．stoodoutB．standsoutC．wouldstandoutD．hasstoodout19．Becauseoftheheavysnow,wehadtodelaythevisituntilthisweekendtotheartgallery____inthecenterofourcitythesedays.A．beingheld B．holding C．tobeheld D．held20．Thepeopleinthevillageareso________thattheyarewillingtohelpeveryvisitor.A．optimistic B．energeticC．enthusiastic D．ambitious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）IwastravellingbytheWestCoastExpresstoMangaloretwoyearsago.Berth(鋪位)No.55,notfarfromme,wasoccupiedbyamiddle-agedgentleman.WhenthetrainreachedPalakkadJunctionaround9:00p.m.,alargegroupoftouristsenteredwithmuchnoise.Justthenanothermiddle-agedmanfromthegroupdeclaredthatheownedBerth55.Heevenhadapapergivenbyhistravelagenttosupporthimself.Theticketexaminerarrivedandtoldthesecondmanthatitwasnothisberth.“No,”saidthesecondman.“It’smine.”ApolicemanfromtheRailwayProtectiontriedtogetthesecondmanleave.Buthewouldn’tgivein----andhehadthesupportofhiscompanions.Fierceargumentcontinued,evenlongafterthetrainleftPalakkad.Thensomeoneevenpulledtheemergencychain(應急鏈)aswewereleavingTirurstation,fourstopsafterPalakkad.Nobodycouldsleepanditwasgettinglate.Suddenly,aroundmidnight,Iwatchedateenager,astudentIamsure,climbeddownfromanupperberthclosetome.“Pleasetakemyberth,”hetoldthesecondman,whoaccepteditafterabitofhesitation.Tomygreatsurprise,thestudentthenspreadanewspaperonthefloorandwassoonlostindeepandpeacefulsleep.Bynoweveryonewasquiet,asifnothinghadhappened!I’ma58-year-oldbiologyteacherwhohashandledtworecentgenerationsofstudents.Iwasconvincedonceagainthat,contraytopopularopinions,youngpeoplecanoftenbefar,farnoblerthanmanyolderones.Andthat’sthehopeofournation.1、Wheredidtheauthorspendthenightwhentheargumentshappened?A．Athome.B．Inahotel.C．Onatrain.D．Inarestaurant.2、Whowasreallywrongintheaccident?A．Therailwaystation.B．Thetravelagent.C．Themiddle-agedgentleman.D．Thesecondman.3、Facedwiththetwomen’sarguments,thepassengerswere.A．couriousB．excitedC．angryD．puzzled4、Whywaseveryonequietafterthearguments?A．Theyweretoosleepyinfact.B．Theywereafraidtospeakanything.C．Theyweretiredfromhardwork.D．Theyreachedtheirdestination.5、Readingthepassagegivesreadersasenseof.A．encouragementB．responsibilityC．disappointmentD．excitement22．（8分）Shesatatthepicnictablealone.Recess(休息)wasinfullswing.Sheremainedawkwardaroundherclassmates.Sheseemedunsureofwhattodoorsay,yetIcouldseehereyeslongingforacceptance.Manystudentshadalreadydecidedthatherfriendshipwouldnotbeworththeenergyrequiredtoovercometheawkwardness.Othersteasedher.Mostignoredher—exceptforone.Brianna,theclassclown,wasmakingtheotherstudentslaugh,asusual.“Brianna,doyouseeMollydownthere?Wouldyoumindwalkingdownthereandinvitinghertocomeupherewiththerestofus?”Briannasighed.Icouldtellshedidn’twanttosacrificepreciousminutesofherownrecesstodowhatIwasaskingofher,butIalsoknewherheart.Sheoftenthoughtofothersbeforeherself—ararecharacterforanyone,muchlessakid.Knowingthischoicewashardforher,IpulledoutaD-buck,ourclasscurrency.Thoughbribery(行賄)wasnottheidealwaytohandlethissituation,Ineededhercooperation.“Here,I’llpayyouforyourtime.”Sheofferedaninsinceresmile,graspedthegreenpaper,andheadeddownthehill.Astherestofthechildrenscreamedandlaughed,myeyeslockedonBriannaasshenearedthepicnictable.Mollycouldbedifficult,andIwouldn’thavebeensurprisedifshesentBriannabackalone,refusingherinvitation.Whensheencouragedherselftoastandingposition,Isighedwithrelief.Aminutelater,1felttaponmyshoulder.“Here,Mrs.D．”ShehandedmetheD-buck.“Why?”Iasked.“Ishouldn’tkeepthis.”Hereyesfelltoherfeet,guiltradiatingfromherquietvoice.“Idon’twantMollytothink1onlywenttogethersoIcouldearnamuck.She’smyfriend.”Amomentlater,theywerealllaughingagain,andwhoshouldIseeamongthem,laughingforthefirsttimethatweek?Molly.1、Accordingtotheauthor,whatwasMollylike?A．Sheignoredthejokesfromotherkids. B．Shefeltawkwardatbeingteased.C．Shedesiredtobeacceptedbyotherkids. D．Shehadnoenergytomakefriends.2、WhatdistinguishedBriannafromotherkids?A．Herclowntalent. B．Hercooperation.C．Herhonesty. D．Herkindness.3、HowdidtheauthorfeelasBriannawalkedtoMolly?A．Worried. B．Satisfied.C．Exicted. D．Confused.4、WhatwasthepurposeofBrianna’sreturningtheID-bucktotheauthor?A．TOavoidlosingitoneday.B．TOgetapurefriendshipwithMolly.C．TObribeherteacher.D．TO’escapefrombeingscoldedbyherteacher:23．（8分）NASAhasanewjoblisting,andit’snojoke.TheUSspaceagencyislookingfora“joker”tojointheirplannedmissiontoMars.AmissiontoMarsisnolaughingmatter.Onaverage,theredplanetis140millionmiles(225millionkilometers)awayfromEarth.Atriptherewouldtakearoundeightmonthsinasmallspacecraft.AndMarshasacommunicationsdelayof20minutes.Thismeansthatastronautswillhavetowait20minutesforareply,whenanemergencyhappens.“Whenyou’relivingwithothersinaconfinedspaceforalongperiodoftime,suchasonamissiontoMars,problemsarelikelytooccur,”JeffreyJohnson,ascientistattheUniversityofFlorida,toldtheGuardian.ThisisprobablywhyNASAwantsanastronautwithasenseofhumor.“Thesearepeoplethathavetheabilitytopulleveryonetogether,”Johnsonsaid.Instressfulsituations,perhapshumorisawaytoknowwearen’talone.Bylaughingtogether,weshareourstress.Thenwecanfocusonourjobsinsteadofjustworrying.Thereareotherexamplesofteam“clowns”.OneexampleisthejourneytotheSouthPoleledbyNorwegianexplorerRoaldAmundsen.Itwasadifficultjourney,fullofdanger.AdolfLindstrom,acookatAmundsen’steam,wasa“clown”.Hemadepeoplelaughthroughthewholejourney.AmundsenlaterwrotethatLindstromwasthemostvaluablememberoftheteam.Butifyou’rehopingthatyourfavoriteTVcomedianwillflytoMars,thatprobablywon’thappen.“Beingfunnywon’tbeenoughtolandsomebodythejob,”Johnsonsaid.“Theyalsoneedtobeanexcellentscientistandengineer.”Besides,theymustbeintopphysicalcondition.1、WhatisNASA’snewjoblisting?A．Afunnyengineer. B．Atalentedclown.C．Agoodcook. D．Apopularcomedian.2、Whatdoes“aconfinedspace”inParagraph3referto?A．Acrowdedspace. B．Anemptyspace.C．Anopenspace. D．Asmallspace.3、Howdoestheauthorthinkhumorcanhelpastronauts?A．Itcanstopthemfromfeelingworried.B．Itcanencourageteamworkonamission.C．Itcanhelpthemfeellesshomesick.D．Itcanhelpthemknowthemselvesbetter.4、Whatpointdoestheauthorwanttomakewiththeexampleofthecook?A．Whatexplorerseatontheirjourneyisveryimportant.B．Anamateurcanplayamoreimportantrolethanaprofessional.C．Humorouspeoplecancheerpeopleupindifficultsituations.D．AmissiontoMarsismoredifficultthanajourneytotheSouthPole.5、Whatcouldbethebesttitleofthepassage?A．KeepingtheSpiritsUpB．AMissiontoMarsC．ANewJobListingofNASAD．HumorousAstronautsinNASA24．（8分）Theworld’srichestmanmightseemtohaveitall,butBillGateshasoneregret.Theself-madebillionairesaidhefeltstupidfornotknowinganyforeignlanguages.SpeakinginhisthirdAskMeAnythingquestion-and-answersessionforonlineforumReddit(紅迪網),theMicrosoftfoundersaidthathewishedhespokeFrench,ArabicorChinese.Hesaid:“ItookLatinandGreekinhighschoolandgotA’sandIguessithelpsmyvocabulary.Ikeephopingtogettimetostudyoneofthese—probablyFrenchbecauseitistheeasiest.IdidDuolingoforawhilebutdidn’tkeepitup.”Gates,whoisworth$79.3billion,praisedFacebookfounderMarkZuckerbergforsurprisinganaudienceinBeijingwhenhespokefluentChinese.“MarkZuckerbergamazinglylearnedChineseanddidaQ&AwithChinesestudents—unbelievable,isn’tit?”hesaidThisisn’tthefirsttimeforGatestoadmithisregretoverlanguage.Healsoshowedhishabitsathomeandpersonalinsights.LastFebruary,Gatessaidhelikestodothedisheshimself—tohisownspecialstandardseverynightandalsotoldtheinterviewerthathiswife,Melinda,wouldlikelywantSamuelL.Jacksontoplayherhusbandinabiopic(傳記片).Healsoadmittedthathewouldpickupa$100billifhefounditonthestreet.AshetookthetopspotonForbes(福布斯)28thAnnualBillionaireslistlastyearforthefourthtime,hesaidheisprettybasicwhenitcomestospendingonclothesandfood,butthatheenjoysinvestinginshoesandracquets(球拍)whenheplaystennis.Whenaskedalifelessonhehadtolearnthehardway,thebillionairesaidstayinguptoolateisahabitheisstilltryingtobreak.“Don’tstayuptoolateevenifthebookisreallyexciting.Youwillregretitinthemorning.Pamstillworkingonthisproblem.”hesaid.1、Whichofthefollowingcanbethebesttitleforthepassage?A．AnInterviewwithBillGates B．HowBillGatesSucceededC．BillGates’Regret D．TheRichestBillionaire2、TheunderlinedpartinParagraph8mayactuallymeanthat_____.A．itisimportanttolayagoodfoundationoflifeB．foodandclothingarebasicneedsforpeople’slifeC．hedoesn’tspendmuchmoneyonfoodandclothesD．henevercaresaboutbuyingfoodandclothing3、WhatadvicedidBillGatesgive?A．Avoidstayinguptoolate.B．Beagoodlanguagelearner.C．Dothedishesyourselfathome.D．Pickupthe$100billsinthestreets.4、Whichofthefollowingistrueaccordingtothepassage?A．BillGatesisalsothefounderofFacebook.B．BillGatestoppedthelistofForbes28times.C．BillGateswasgoodatlearninglanguagesinhighschoo1.D．BillGates’wifewantsSamueltoplayagamewithGates.25．（10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．anythingtheflightstafftellyoutodoB．generalsafetyadviceC．walkingaroundtheplaneD．pouringhotdrinks3、WhichofthefollowingisNOTtrue?A．largerplaneshavemoresafetychecksandaresaferinanaccident.B．Take-offsaresaferonnon-stopflightsthanlanding.C．Everyaircraftisdifferent,sothesafetyproceduresmaybedifferent.D．Seatbeltsshouldbeworntoprotectagainstsuddenchange.4、Thebesttitleshouldbe.A．ThesafestwaytotravelB．AirsafetytipsC．Non-stopRoutesD．Howtotakeaplane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）Ihadn’tevengotachancetoenterthestorebeforeanAfricanAmericanwomanapproachedmeandaskedifIwouldhelpherreturnanitem.Theitemshehad1wasintendedforherdaughter,butshehadalreadyreceiveda2one.Thelady3toexchangetheitemforsomethingelseinthestorebutshewastoldsheneededanID4thedealcouldnottakeplace.Iwenttothe5withthewomansowecouldusemyID．Thesalesassociateimmediatelystarted6herofaskingthefirst7personshesawtohelpher.Althoughthatwas8,Ididn’tunderstandwhyit9Afterall,noteveryoneisgiventheopportunityto10anIDinthiscountry.Then,weaskedtospeakwithamanager,whoexplainedthattherewasno11toreturntheitemwithoutareceiptandthenwentontosaythewomancouldnot12shepurchasedtheitem.“13I,ayoungwhitefemale,weretoenterthestoreandrequestyoutomakeanexchangewithoutareceipt,Iwouldnotbe14theprivilege—asIhaveprooffromthepast.”Isaid.Hemusthaverealizedatthatmomentwhathehaddone,becausehe15toexchangetheitem.Therearemanyvaluablelessonsinthestory.Thefirstistohelpastrangerinneed.I16whenthewomanaskedformyhelp,but17doIactuallyhave?”Ihadnone,soIhelpedher.Thesecondlessonisnottojudgeabookbyits18Thewomanlookedpoor,butshe19thesametreatmentasanyoneelsedoes.1、A．purchasedB．shownC．lostD．mended2、A．sameB．popularC．similarD．different3、A．managedB．wantedC．refusedD．promised4、A．forB．orC．andD．so5、A．counterB．departmentC．marketD．window6、A．warningB．informingC．remindingD．accusing7、A．fairB．familiarC．impossibleD．random8、A．wrongB．trueC．reasonableD．meaningful9、A．matteredB．happenedC．passedD．worked10、A．leaveB．payC．findD．obtain11、A．requestB．placeC．wayD．need12、A．answerB．proveC．supportD．admit13、A．UnlessB．AndC．InsteadD．If14、A．orderedB．askedC．deniedD．given15、A．agreedB．preparedC．failedD．remembered16、A．struggledB．wonderedC．hesitatedD．nodded17、A．totallyB．graduallyC．hardlyD．quickly18、A．feelingsB．goalsC．reasonsD．ideas19、A．designB．coverC．contentD．price20、A．deservedB．requiredC．receivedD．appreciated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個適當的單詞或括號內單詞的正確形式。27．（15分）IfyougotoZhuguanlongvillageinFujianProvince,youwon'tmissatwo-floorlibrary.Itisthefirstlibrarythere,1．hasbeenopenforfreefor44years!Thecreatorisoneofits2．(village)—LiuShijiang.WhydidLiuopenthislibrary?Backin1974,Liu3．(finish)hisstudyinhighschool.Atthattime,villagerswouldaskhimtotellstories.Butitwasn'tlongbeforeLiu'sstoriesrunout.Besides,manyvillagersplayedmahjongandcardstokillthetime."HowcanIgivemyselfandothersahealthierpastime?"Liuasked4．(he).That'swhenhedecidedtobuysomebooks.Hesoldtheonlypigofhisfamilyfor200yuanandborrowedanother400yuan5．(buy)books,bookshelvesandchairs.Andoneofhisrooms6．(make)intoalibrary.As7．result,moreandmorevillagersgatheredtheretoreadbooks,suchasstorybooksorworksabouthowtogrowbettercrops.Overtheyears,Liumetwithmanykindsofdifficulties；,8．hehasbeenabletoovercomethemandkepthislibraryopen.Amongreaderstherearethebook-lovingstudentsandteachers."Itisthebusiesttimeforthelibrarywhenthechildrenareonwinterorsummerholidays,"saidLiu."Now,histwo-floorlibraryhasmorethan7,000booksandacomputer,aDVDrecorder;andKaraoke,9．(offer)moreentertainmentandlearningchoicestothevillagers."Ihavedevotedmypastyearstothelibrary,andIwillkeephercompanyinthefollowingyears,saidtheman,nowinhis10．(sixty).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）假如英語課上老師要求同桌之間交換修改作文,請你修改你同桌的以下作文,文中共有10

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不計分。IstillrememberthefirstdayIcometothisnewschool.Everythingwasnewtome，whatmademerealizeIwasnolongerasmallchild.Ihadtodependonme.Luckily，Imadeseveralgoodfriend.Theirinterestsweresimilarwithmine.IhadgreatEnglishteacher,Maggie.SheletmeknowtheimportantofEnglish.SoIdecidedtolearnEnglishhardly.Althoughitwasverydifficultatfirst,butwiththehelpofmyteacher,Imaderapidlyprogress.Justastheoldsayinggoes,“Wherethereisawill,thereisaway.”第二節(jié)書面表達（滿分25分）29．（25分）近來，共享單車(sharedbikes)成為中國時尚，它因方便、環(huán)保而廣受好評，然而共享單車也出現了許多弊病，例如亂停放、人為破壞、非法占有等。假如你是光明中學的學生李華，請你將有關情況反映給政府相關部門并闡述你的看法。內容要點包括：1.共享單車的問題；2.出現問題的原因；3.解決問題的意見或建議。注意：1.詞數100左右；2.可以適當增加細節(jié)，以使行文連貫。DearSir,__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________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、C2、B3、B4、C5、B6、D7、B8、C9、B10、C11、A12、B13、C14、B15、A16、A17、C18、B19、A20、C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、C2、B3、C4、A5、A22、1、C2、D3、A4、B23、1、B2、D3、B4、C5、C24、1、C2、C3、A4、C25、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.Groundstationshavebeenbuilttomonitorlargerpiecesofspacetrashtopreventthemfr