2025屆江蘇泰興一中英語高三第一學(xué)期期末聯(lián)考試題含解析

2025屆江蘇泰興一中英語高三第一學(xué)期期末聯(lián)考試題注意事項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(wù)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(yīng)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．Inspiteof_________hasbeensaid,quitealotofpeoplearestilluncertainaboutthestateofthecountry’seconomy.A．what B．whichC．that D．a(chǎn)s2．—Whatdoesthesignoverthereread?—"Noperson_______smokeorcarryalightedcigarette,cigarorpipeinthisarea．"A．shall B．may C．must D．Will3．Eversincethenewparkwasopenedtothepubliclastmonth,I______awalkiniteverymorning.A．a(chǎn)mtaking B．takeC．havetaken D．havebeentaking4．—TheT--shirtIreceivedisnotthesameasisshownonline.—________？ButIpromiseyouwe’lllookintoitrightaway.A．Whosays B．HowcomeC．Whatfor D．Whyworry5．________toherownwork，shespentlittletimewithherfamilyA．DevotingB．TobedevotedC．DevotedD．Havingdevoted6．Asasurgeon,Icannotanymistakes;itwouldbedangerousforthepatient.A．a(chǎn)ppreciate B．removeC．offer D．a(chǎn)fford7．Asisoftenthecase,therearealwayssomeobstaclesintheway，something________beforewerealizetherealgoalofeducation.A．tobegotthrough B．gotthroughC．gettingthrough D．havingbeengotthrough8．________onFebruary5,2019,theWanderingEarthsoonbecameagreathit.A．Releasing B．BeingreleasedC．Released D．Torelease9．Itrainedthismorning,_____actuallydidn’tbothermebecauseIlikewalkingintherain.A．what B．whenC．where D．which10．Thetrafficproblemswearelookingforwardtoseeingshouldhaveattractedthegovernment'sattention.A．solving B．solve C．solved D．tosolve11．Apublichealthcampaign_____thenumberofheartdiseasedeathsby80percentoverthepastthreedecades．A．hadreduced B．hadbeenreducedC．hasreduced D．hasbeenreduced12．It'sgreatthatallthevisitorswho

ontheislandweresaved.A．trapped B．havebeentrappedC．hadtrapped D．hadbeentrapped13．Thewarmthof____coatwillmostlybedeterminedby____softofclothused.A．the;a B．a(chǎn);the C．/;the D．a(chǎn);a14．Iamsothrilledtohavemyunderwaterphotos______intheNationalGeographicandonthecover!A．tobefeatured B．featured C．beingfeatured D．tofeature15．Competedin1891,in________wasknownasTheGildedAge,thefive-storymansionisnowownedbyafamousactorwhodecidestostageaspecialproductionofShakespeare'sHamlet.A．that B．what C．which D．it16．TheeducationsysteminChinaisverydifferentfrom________intheUSA．A．oneB．itC．thoseD．that17．—Heisgoodatalotofthingsbutitdoesn’tmeanheisperfect.—___________Actuallynooneis.A．What’sgoingon? B．Let’sgetgoing.C．Thankgoodness. D．I’mwithyouonthat.18．Theexpertpointsoutthephenomenonthatcreamgoesbadfasterthanbutter______itsstructureratherthanitschemicalcomposition.A．livesupto B．getsdowntoC．comesdownto D．standsupto19．AfternineyearsworkingtoprotectSiberiantigers,YangJun_____hiseffortsrecognizedattheannualawardceremonyinBeijingwherehewasnameda"wildlifeprotector".A．had B．hadhadC．hashad D．has20．---Marywasaskedtodosomethingimportant.---Itdoesn’tmatter.Let’stheworkwhereitisleftoff.A．takeup B．takedown C．takein D．takeoff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）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．Howtotakeaplane22．（8分）Amidgrowingglobalcondemnationofelephantridingasatouristactivity,YokDonNationalParkinsouthernVietnamhasendedthepracticeandreplaceditwiththefirstethical(倫理的)elephantexperienceofitskindinthecountry.Theformallycaptivegroupoffourelephantswerereleasedfromtheirchainsearlierthismonthandnolongercarrytouristsonridesthroughthepark.Visitorscaninsteadobservetheanimalsroamingfreelyintheirnaturalhabitat.TheparkworkedontheinitiativewithAnimalProtectionAsia,whichcampaignsforlong-termchangesinanimalwelfareandtourisminVietnam.Theofficialagreementbetweenthecharityandthestate-runparkwassignedon13July,andrunsuntilApril2023,withthefirsttourstakingplaceearlierthismonth.Overthenextfiveyears,itishopedthatthenewmodelwillprovideasmuchorevenmorerevenueforownersasriding,andencouragemahouts(管象人)andelephanttourismcompaniestofollow.Thisprojecthasentirelychangedthelivesoftheelephantsattheparkanditalsoprovidesamuchbetterexperienceforthetourists.Misusehasbeenreplacedwithrespect,andtheanimalslookmuchhealthierandhappierthanbefore.Awarenessoftheadverseeffectsofelephantridinghasincreasedinrecentyears,withagrowingnumberoftouristsavoidingcruelattractionsandsupportingwelfarecentresandanimalprotectioninstead,alongsideanincreasingnumberoftouroperatorsrefusingtosellelephanttreksthatincluderiding.Manyoftheelephantsusedinridingandotheractivities,suchaspaintingorperformingtricks,arecaughtasbabiesfromthewild,theirmothersoftenkilled.Oncecaptured,theytypicallyundergointensiveconditioningknownas“crushingthespirit”,wheretheyarekeptintinypensandbeatenandstarved,sometimesforweeks.Oncetrained,manyoftheanimalseventuallydiefromexhaustion.CampaignersandcharitieshopetocontinuetoeducatetheindustryinVietnamandaroundtheworld,andshowhowprofitableethicalelephantexperiences,withretiredandrescuedanimals,canbe,instead.1、WhatistrueformostworkingelephantsinVietnam?A．Theyareallowedtoroamfreely.B．Theyarechainedupandcruellytreated.C．Theyoutnumberthosefoundinthewild.D．Theyarekeptwiththeirmothersduringtraining.2、WhatisthegoalofAnimalProtectionAsia?A．Itseekstoraisemoneyfornationalparks’operation.B．ItwantstoorganizemoresightseeingtoursinVietnam.C．Ithopestosetanewmodelforelephanttourismcompanies.D．ItexpectstoeventuallyfreealltheworkingelephantsinAsia.3、Whichofthefollowingbestexplains“adverse”underlinedinparagraph5?A．Practical. B．Unexpected.C．Financial. D．Negative.4、Whatcanbeasuitabletitleforthetext?A．SaynotoelephantridingB．AnewprofitablemodelC．VietnamtakestheleadD．Negativeeffectsofelephanttourism23．（8分）Anenvironmentfullofinterestingorexcitingideasisimportantforyoungchildren,andmuchofachild’sbraindevelopsduringtheearliestpartoflife.Thevisualsystem,inparticular,developsrapidlyoverthefirstfewweeks.Asearlyasnineminutesafterbirth,babiesprefertolookatphotographsandpicturesthatmostresemblethehumanface.Newbornscanseecolor,andaone-month-oldcantellredfromgreen.At12weeksold,babiesshowpreferencesforcoloredthingsasopposedtowhiteones.Inadditiontolookingatthemselves,babiesareattractedtohighcontrastvisuals,colorfulobjects,andfaces.Thesameholdstrueforbabies,whoalsoaredrawntolookingatanimals,shinyobjects,andfamiliaritemsthatarepartoftheirworld.It’snosurprise,then,thatanartmuseumisarichsourceofvisualinspirationforbabies.Introducingbabiestoworksofartpromotesearlyneuron（神經(jīng)元）connectionsinthebrain.Andfortheverbalstudy,interactingwithanadultinnamingimagesanddescribingdifferentcharacteristicsinaworkofartlaysthegroundworkforvisualandlanguagedevelopment.FreeBabyToursWatchyourchildrespondtolargecolorfulpaintingsandlearnwaystopromoteearlyvisualskills.Joinusforalivelyandfree30-minuteBabyTour.Parentsandcaregiverswithbabiesupto18monthsarewelcome.MeetattheTMAFamilyCenteronanyoftheseFridays:January15,3:30p.m.February19,6p.m.March18,3:30p.m.April15,6p.m.May20,3:30p.m.June17,6p.m.Onechildperadult.Parkingisfreeformembers,$5fornonmembers.1、Aone-daybabymayprefertolookatpicturesof________.A．biganimalsB．humanfacesC．colorfulleavesD．whitewalls2、Whatisthebenefitforbabieswhentheyenjoyworksofart?A．Learningthehistoryofthemuseum.B．Learninghowtomasterskillsonart.C．Knowinghowtolovetheirparents.D．Layingthebasisforlanguagedevelopment.3、What’sthemainpurposeofthetext?A．Toattractpeopletojoininthisbabyactivity.B．Toshowhowtodevelopbabies’interestinart.C．Tohelpparentsknowmoreaboutart.D．Topromotebabies’earlyvisualskills.24．（8分）Whatwillpoweryourhouseinthefuture?Nuclearwindorsolarpower?AccordingtoscientistsattheMassachusettsInstituteofTechnology(MIT)intheUS,itmightbeartificialleaves.Naturalleavesareabletochangesunlightandwaterintoenergy.Itisknownas

photosynthesis

(光合作用).Nowresearchershavefoundawaytoimitatethisprocess.TheartificialleafdevelopedbyDanielNoceraandhiscolleaguesatMITcanbeseenasaspecial

siliconchipwith

catalysts(催化劑).Similartonaturalleaves,itcansplitwaterintohydrogen

andoxygenwhenputintoabucketofwater.Thehydrogenandoxygengasesarethenstoredinafuel

cell

(電池),usingthosetwomaterialstoproduceelectricity,locatedeitherontopofahouseorbesidethehouse.Thoughtheleafisonlyabouttheshapeofapokercard,scientistsclaimedthatitispromisingtobean

inexpensivesourceofelectricityindevelopingcountries.“OnecanimaginevillagesinIndiaandAfricanotlongfromnowpurchasinganaffordablebasicpowersystembasedonthistechnology”saidanAmericanscientist,Nocera.Anartificialleafisnotanewidea.Thefirstartificialleafwasinventedin1997butwastooexpensive

andunstableforpracticaluse.Thenewleaf,however,ismadeofcheapmaterials,easytouseandhighlystable.Inlaboratorystudies,Nocerashowedthatanartificialleafcouldoperate

continuouslyforatleast45hours.ThewonderfulimprovementscomefromNocera’srecentdiscoveryofseveralpowerfulnew,

inexpensivecatalysts.Thesecatalystsmaketheenergy

transformationinsidetheleafmore

efficientwithwaterandsunlight.Rightnowthenewleafisabout10timesmoreeffectiveatcarryingoutphotosynthesisthananaturalone.Besides,thedevicecanruninwhateverwaterisavailable.

Thisisimportantforsomecountriesthatdon’thaveaccesstopurewater.Hopefully,eachhomecouldhaveaccesstothenewapplicationinthefuture.1、Thepurposeofthisarticleisto________.A．introduceanewkindofdeviceB．a(chǎn)skpeopletodotheresearchC．a(chǎn)dvertisethenewproductD．showtheprocessofphotosynthesis2、WhichofthefollowingisNOTtheadvantagesofthenewleaf?A．It’slowincost.B．It’ssmallinsize.C．Ithasawonderfulfuelcell.D．It’sconvenientforpeopletouse.3、Whatconclusioncanbedrawnfromthetext?A．Nocerathoughtthenewleafisexpensivefordevelopingcountries.B．VillagesinAfricahavebenefitedalotfromthenewinvention.C．Siliconchipcanhelpthenewleafworkmoreeffectively.D．Theequipmentdoesn’tnecessarilyoperateinpurewater.4、What’sthewriter’sattitudetowardsthenewdevice?A．Negative.B．Optimistic.C．Doubtful.D．Uncertain.5、Accordingtothetext,whatwilltakeplaceinthefuture?A．Naturalleaveswilltaketheplaceofartificialleaves.B．Scientistswilldevelopmorewaystoproduceenergy.C．Thenewinventioncouldbewidelyusedinthefuture.D．Developingcountrieswillcontributemoretotheresearch.25．（10分）AfterIvisitedmyeldersister’shouse,Iwasremindedjusthowdifferenttheapartmentlivingwithachildwas.Shehasanicebighousewithafewfloors,abigbackyardandlotsoftoys.HerhouseismysonTom’slittlepieceofheaven.Atherhousetherearelittletoys,bigtoys,adollhouse,aplayhouseandmore!Therearebedroomstockedwithtraintables,ride-ontoysandbigtrucks.Themaindifferenceaboutbeinganapartmentmomisthatyoucannotbecomeacollectorof“things”.Icontinuallygetridofanythingtoolarge.WhenTomwasborn,wemadearulethattherewouldneverbeanystuffedanimalsinourapartmentthatwerelargerthanhimatthattime.Wealsomadearulethatwewouldonlyeverhaveatmostfivestuffed“anything”atonetime.Sofarthishadworkedoutwellforus.TheserulesleftTomwithafewspecialsoftcreaturestoplaywith,butthatcanbeeasilyputaway.Sincewewanttokeeptheappearanceofbeingcleancitydwellers,wehavelimitedTom’splaythingstoonetoybasketinthemainlivingspaceandonebigstoragebininhisbedroom.IamconstantlythinkingaboutlivingspacewhenIbuyanythingforourlittleTom.WelovethestoragebininTom’sroom.Itisfilledwithfunplaythings.Itisaplacetokeephistoysandeverythinggetspulledinandoutdaily.Anythingthatdoesn’tfitisoftenweededouttocreatespace.Tomabsolutelylikesgoingtohisaunt’shouseandpullingouteverysingletoyavailabletohim.Ofcourse,Tomdoesnotnoticethatwhenhereturnshomeheonlygetsonebasketoftoysinsteadofmanyroomsoftoys.RightnowTomlivesfullyinhis1,100-square-footapartmentandseemsverysatisfiedwithhisbasketoftoys.1、ByParagraph1thewritermainlywantstotellusthathersister________.A．lovesbuyingtoysforherselfB．hasseveralchildrenC．livesinahousewithmanytoysD．doesn’tkeepherhousetidy2、Whatdoestheunderlinedpart“weekendout”inparagraph3mean?A．removedB．washedC．storedD．played3、Thelastparagraphshowsthat________.A．thewriterwantstoliveinabighouseB．Tomdoesn’tlikethetoysinhistoybasketC．Tomdoesn’tlikethetoysinhisaunt’shouseD．thewriter’srulesabouttoysworkoutverywel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）Studieshaveshownittakesaphysicianabout18secondstointerruptapatientaftertheybegintalking.ItwasSunday.Ihadonelastpatienttosee.I1herroominahurryandstoodatthedoorway.Shewasanolderwoman,sittingattheedgeofthebed,2toputsocksonherswollenfeet.Icrossedthethreshold(門檻),spoke3tothenurse,andscannedherchartnotingshewasinstablecondition.Iwasalmostintheclear.Ileanedonthebedraillooking4ather.SheaskedifIcouldhelpputonhersocks.5,Ibeganamonologuethatwentsomethinglikethis:“Howareyoufeeling?Yoursugarsandbloodpressurewerehighbutthey’re6today.Thenursementionedyou’reanxioustoseeyour7who’svisitingyoutoday.It’snicetohaveafamilyvisitfromfaraway.Ibetyoureallylookforwardtoseeinghim.”Eachstoryis8Somearedetailed;othersarevague.Somehaveabeginning,middleandend.Otherswanderwithoutaclear9Somearetrue;othersnot.Yetallthosethingsdonotreally10Whatmatterstothestorytelleristhatthestoryis11—withoutinterruption,assumptionorjudgment.Listeningtosomeone’sstorycosts12thanexpensivediagnostictestingbutiskeytohealinganddiagnosis.Ioftenthoughtof13thewomantaughtme,andIremindedmyselfofthe14ofstopping,sittingdownandtrulylistening.And,notlongafter,inanunexpected15,Ibecamethepatient,withadiagnosisofmultiplesclerosis(診斷為多發(fā)性硬化癥)atage31.Now,20yearslater,Isitallthetime—inawheelchair.For16Icould,Icontinuedtoseepatientsfrommychair,butIhadtoresignwhenmyhandswere17Istillteachmedicalstudentsandotherhealthcareprofessionals,butnowfromtheperspectiveof18andpatient.ItellthemIbelieveinthepowerof19ItellthemIknowfirsthandthatimmeasurablehealingtakesplacewithinme20someonestops,sitsdownandlistenstomystory.1、A．entered B．stepped C．passed D．a(chǎn)pproached2、A．hoping B．wishing C．struggling D．pulling3、A．quickly B．slowly C．carefully D．carelessly4、A．a(chǎn)way B．up C．a(chǎn)round D．down5、A．However B．Instead C．Therefore D．Moreover6、A．good B．better C．more D．well7、A．son B．daughter C．friend D．sister8、A．unique B．similar C．different D．wonderful9、A．way B．direction C．conclusion D．instruction10、A．a(chǎn)ttract B．exist C．a(chǎn)ppeal D．matter11、A．a(chǎn)ppreciated B．told C．enjoyed D．heard12、A．less B．more C．higher D．cheaper13、A．which B．how C．what D．that14、A．pleasure B．difference C．behavior D．importance15、A．twist B．a(chǎn)ccident C．occasion D．thing16、A．a(chǎn)sgoodas B．a(chǎn)slongas C．a(chǎn)ssoonas D．a(chǎn)swellas17、A．wounded B．a(chǎn)ffected C．injected D．hurt18、A．physician B．hospital C．teacher D．school19、A．stopping B．talking C．listening D．sitting20、A．before B．when C．until D．unless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）語法填空APEC，__1．__(establish)in1989，isshortforAsia-PacificEconomicCooperation.InJanuary1989，AustralianPrimeMinister__2．__(raise)theproposalduringhisvisittoSeoul，RepublicofKorea.Afterconsultationswithrelevantcountries，thefirstministerialmeeting__3．__(hold)inCanberra，Australiafrom6to7November1989.APEC，__4．__goalistoadvanceAsia-Pacificeconomicdevelopment，__5．__(work)hardtomeetthedemandsofgrowinginterdependenceamongAsia-Pacificcountries.More__6．__(important)，thepurposeofAPECmeetingistopromotefreetradeandcooperation__7．__tostrengthenanopenmultilateral(多邊的)tradingsystem.TheactivitiesofAPECcoverthe__8．__(promote)ofregionaltrade，investment，finance，humanresourcesdevelopmentandtechnologytransfer.APEC_9．__(have)21membercountriessofar.CooperationamongAPEC'smembersisgovernedbytheprincipleofequalrespectfortheviewsofallparticipants，anditisbecauseofthisprinciple__10．__“mutualrespectandmutualbenefit”becomesitsconsensus.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）WearegoingtotaketheCollegeEntranceExamsinaboutsixteendays、Therefore,manystudentsstilldon’tknowwhattobalancetheirstudy,restandphysicalexerciseswhilepreparedfortheExams、Theyusuallydevotetoomuchtimetogoovertheirlessons,whatresultsinapoorhealthandlowefficiencyoflearning、Astheproverbgoes,earlytobedandearlytorisemakeamanhealthy,wealthyandwise、We’dbetterleaveusenoughtimetorestandsleepsinceitenablesustolearnourlessonsmoreefficient、What’smore,astrongandhealthybodyisthebaseforourfurtherstudy,futureworkandcreativeactivities、Inbrief,aswearepreparingfortheExams,don’tforgetthatrest,exerciseandstudywereequallyimportant、第二節(jié)書面表達（滿分25分）29．（25分）某中學(xué)生英文報開設(shè)了“After-classActivities”的欄目，請你根據(jù)以下提示，為該欄目寫一篇英文稿件，并鼓勵同學(xué)們積極參加課外活動。1.你校開展課外活動的情況；2.你參加過的課外活動及給你帶來的益處;3.為同學(xué)選擇課外活動提出建議;4.為學(xué)校開展課外活動提出建議。注意：詞數(shù)120左右。______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

參考答案第一部分（共20小題，每小題1.5分，滿分30分）1、A2、A3、D4、B5、C6、D7、A8、C9、D10、C11、C12、D13、B14、B15、B16、D17、D18、C19、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、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）witheachother