2025届河北省承德市鹰城一中高三第二次诊断性检测英语试卷含解析

2025届河北省承德市鹰城一中高三第二次诊断性检测英语试卷注意事项1．考试结束后，请将本试卷和答题卡一并交回．2．答题前，请务必将自己的姓名、准考证号用0．5毫米黑色墨水的签字笔填写在试卷及答题卡的规定位置．3．请认真核对监考员在答题卡上所粘贴的条形码上的姓名、准考证号与本人是否相符．4．作答选择题，必须用2B铅笔将答题卡上对应选项的方框涂满、涂黑；如需改动，请用橡皮擦干净后，再选涂其他答案．作答非选择题，必须用05毫米黑色墨水的签字笔在答题卡上的指定位置作答，在其他位置作答一律无效．5．如需作图，须用2B铅笔绘、写清楚，线条、符号等须加黑、加粗．第一部分（共20小题，每小题1.5分，满分30分）1．----CanIparkmycarhere?----Surenot,wedon’tallowhere.A．toparking B．park C．topark D．parking2．Aftermakingthespeech,hewentthroughitinhismindtoreflectwherehe_________better.A．coulddo B．woulddo C．couldhavedone D．wouldhavedone3．—Amazing!Youwearslippersatwork.—Don’tyouknowit’safashion?A．must B．should C．can D．may4．Iwouldn’thavemissedthetrainifI______upearlier.A．got B．hadgot C．willget D．havegot5．—IntheUK，somepeopleequatelifeexperiencewiththenumberofstampsintheirpassports.—That’swhytheyallagreethatthey________the“travelbug”．A．catchB．caughtC．havecaughtD．aretocatch6．Cambridgegaveapositiveanswerinquiriesonwhetheritrecognizesgaokaoscores.A．infavorof B．inresponsetoC．insaluteto D．inconsequenceof7．Thiswasreturnedbecausetheperson________thisletterwasaddressedhaddiedthreeyearsago.A．towhom B．towhichC．which D．whom8．Difficultiesstrengthenthemind,_____labourdoesthebody.A．if B．asC．for D．so9．Playingwiththeirpeers,childrenlearntoandnotdoexactlywhattheywanttodo.A．compromiseB．competeC．contributeD．construct10．______youaresupposedtodo______youdon'tlikeathingis______it.Don'tcomplain.A．That;what;change B．When;that;tochangeC．What;when;change D．What;that;changing11．It’sreallystupidofyou____himthenewsyesterdaysothatithasbeendisturbinghimallthetime．A．havingtold B．telling C．totell D．tohavetold12．Ihadhardlyrungthebell________thedoorwasopenedsuddenly,andmysonrushedouttogreetme.A．beforeB．untilC．asD．since13．Asoftenhappensafterlongsleeplessness,hewas________byanunreasoningpanic.A．seizedB．fascinatedC．impressedD．embarrassed14．Thepartinthefilmthemanbrokedownthedoormadesomeoftheaudiencegiveacry.A．which B．who C．where D．whom15．—Steve,thevacationiscomingsoon．Haveyoufoundasummerjobyet？—IsupposeIcanworkattheboy’scamp_____Iworkedlastsummer．A．that B．where C．which D．what16．TheOxfordEnglishDictionaryisnecessaryforlearningEnglish,soyou'dbetterbuy___.A．this B．that C．it D．one17．---Mom,canyougivemeanextra200yuanamonth?---Son,wehavejustboughtahouse,andfromnowonweneedtopractisestrict.A．economyB．medicineC．self-controlD．patience18．—________!Somebodyhasleftthelabdooropen.—Don’tlookatme.A．Hi,there B．DearmeC．Thankgoodness D．Comeon19．－Doyoureallymeanitwhenyousayhewillagoodpresident?A．judge B．duit C．turn D．Serve20．Inmanyways,themagicofAIis________it’snotsomethingyoucanseeortouch.A．whether B．whatC．that D．why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）Abitefromatsetseflyisanextremelyunpleasantexperience.Tomakemattersworse,severalspeciesoftsetseflycantransmitdiseases.Oneofthemostdangerousisaparasite(寄生虫)thatcauses"sleepingsickness".Aftertheinitialbite,sleepingsicknesssymptomsoftenstartwithafever,headachesandachingmuscles.Astheillnessgoeson,thoseinfectedbecomeincreasinglytired,whichiswhereitgetsitsname.Itisworthnotingthatsleepingsicknessisnolongerasdeadlyasitoncewas.Intheearly20thCenturyseveralhundredthousandpeoplewereinfectedeachyear.Bythe1960sthediseasewasconsidered"undercontrol"andhadreachedverylownumbers,makingitsspreadmoredifficult.Butinthe1970stherewasanothermajorinfection,whichtook20yearstocontrol.Sincethen,betterscreeningprogramsandearliertreatmentshavereducedthenumberofcasesdramatically.In2000thisfiguredroppedtofewerthan3,000.TheWorldHealthOrganization(WHO)hopesthediseasewillbecompletelyremovedby2020.Moreproblematically,aseriesofnewstudieshaveshownthattheparasiteismorecomplicatedthanpreviouslybelieved.Sleepingsicknesshasalwaysbeenconsidered—andanalyzed—asablooddisease,becausetheparasitescanreadilybediscoveredinthebloodofitsvictims.However,inarecentstudyfoundthattheparasitecanstayintheskinandfat,aswellasintheblood.Theremayevenbeahigherdensity（密度）oftheparasiteintheskinthanintheblood.Thatmeansapersoncanhavenosymptomsbutstillbothharborthediseaseandspreadit.Thefindingcouldexplainthemysterious1970sinfection,andwhythediseasecanspringupinareasthathadpreviouslybeencleared.1、What'sthedangerofatsetseflybite?A．Itmakespeoplesleepy.B．Itcausesskindisease.C．Itbringsaboutdeaths.D．Ittransmitsdeadlyparasites.2、WhatcanweinferaboutsleepingsicknessfromParagraph3?A．It'sstillathreattohumanhealth.B．It'snotthatdangerousatpresent.C．It'sincurableintheearly20thcentury.D．It'scompletelyundercontrolinthe1960s.3、Whatdoestheunderlined"harbor"mostprobablymean?A．carryB．resistC．exchangeD．hide4、Whatdoesthelatestresearchindicateaccordingtothepassage?A．Sleepingsicknessisablooddisease.B．Skinismoresuitablefortheparasitetogrow.C．Sleepingsicknesscanbespreadwithnosigns.D．Parasitesintheskincausedthe1970sinfection.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）Thefirstdrawingsonwallsappearedincavesthousandsofyearsago.LatertheAncientRomansandGreekswrotetheirnamesandprotestpoemsonbuildings.ModerngraffitiseemstohaveappearedinPhiladelphiaintheearly1960s,andbythelatesixtiesithadreachedNewYork.Thenewartformreallytookoffinthe1970s,whenpeoplebeganwritingtheirnames,or“tags”,onbuildingsalloverthecity.Inthemid-seventiesitwassometimeshardtoseeoutofasubwaycarwindow,becausethetrainswerecompletelycoveredinspraypaintingsknownasmasterpieces.Intheearlydays,the“taggers”werepartofstreetcrowdswhowereconcernedwithmarkingtheirterritory(领地).Theyworkedingroupscalled“crews”andcalledwhattheydid“writing”—theterm“graffiti”wasfirstusedbyTheNewYorkTimesandthenovelistNormanMailer.ArtgalleriesinNewYorkbeganbuyinggraffitiintheearlyseventies.Butatthesametimethatitbegantoberegardedasanartform,JohnLindsay,thethenmayorofNewYork,declaredthefirstwarongraffiti.Bythe1980sitbecamemuchhardertowriteonsubwaytrainswithoutbeingcaught,andinsteadmanyofthemoreestablishedgraffitiartistsbeganusingroofsofbuildings.Thedebateoverwhethergraffitiisartordeliberatedamageisstillgoingon.PeterVallone,aNewYorkcitycouncilor,thinksthatgraffitidonewithpermissioncanbeart,butifitisonsomeoneelse’spropertyitbecomesacrime.“Ihaveamessageforthegraffitidestroyersoutthere,”hesaidrecently,“andyourfreedomofexpressionendswheremypropertybegins.”Ontheotherhand,Felix,amemberoftheBerlin-basedgroupReclaimYourCity,saysthatartistsarereclaimingcitiesforthepublicfromadvertisers,andthatgraffitirepresentsfreedomandmakescitieslivelier.Fordecadesgraffitihasbeenaspringboardtointernationalfameforafew.Jean-MichelBasquiatbegansprayingonthestreetinthe1970sbeforebecomingarespectedartistinthe80s.TheFrenchmanBlekleRatandtheBritishartistBanksyhaveachievedinternationalfamebyproducingcomplexworkswithstencils(模板),oftenmakingpoliticalorhumorouspoints.WorksbyBanksyhavebeensoldforover£100,000.Graffitiisnowsometimesbigbusiness.1、Whywastheseventiesanimportantdecadeinthehistoryofgraffiti?A．Thatwaswhenmoderngraffitifirstbecamereallypopular.B．Thatwaswhenmoderngraffitifirstappeared.C．ThatwaswhengraffitifirstreachedNewYork.D．Thatwaswhengraffitifirstappearedonsubwaycarwindows2、Whatdoestheunderlinedword“taggers”inthesecondparagraphmean?A．Namesofpeoplewhograffitied.B．Buildingwherepaintsweresprayed.C．Peoplewhomarkedsurfacewithgraffiti.D．Peoplewhowereinterestedingraffiti.3、Whatcanweknowfromthethirdparagraph?A．NewYorkersthinkgraffitiisart.B．Graffitiwasacceptedbyofficialscompletely.C．Buildingscanbecoveredwithgraffitifreely.D．Therewereonceadvertisementsoncitysurface.4、Whatistheauthor’sfinalopinionaboutgraffiti?A．Graffitihasnowbecomemainstreamandcanbenefitartists.B．Graffitiisnotagoodwaytobecomearespectedartist.C．Somepopulargraffitiartistsendupbeingignoredbytheartworld.D．Somegraffiticausedinconveniencetothelocalenvironment.24．（8分）WeallarefamiliarwithAndroidandiOSplatformsasbotharepopularbutarequitedifferentwhenitcomestofunctionalities.IfyouaremakingabigmovefromAndroidtoiPhone,thenthefirstthingthatcountersyourmindishowtogetyourdataontheiPhone.Note:YouneedtoturnonWi-FionyourAndroid&iPhoneandconnectthemwiththesamenetwork.So,let'sgetstartedandlearnhowtotransferdatafromAndroidtoiPhone.Note:Pleasekeepinmindthatthestepsmightvaryfromdevicetodevice.Install(安装)the"MovetoiOS"ApponyourAndroiddevicefromtheGoogleplaystore.ThisapplicationisdevelopedbyAppleandavailableforfree.Onceyouaredonewithinstallingtheapp,youneedtograntpermissionstotheapp.Now,followon-screeninstructionstoproceed.Now,keepyourAndroidasideandstartyouriPhone.Followtheon-screeninstructionstosetupyouriPhone.Thetransfermighttakeabitlongerdependinguponthesizeofthecontent.OnyouriPhonescreen,youwillseeascreensaying,"ContinuesettingupiPhone".YoucancontinuesettingupyourAppleIDonyournewiPhone.Oncedone,youwillfindallyourdatasuchascontacts,messages,bookmarks,picturesetc.onit.That'sit,nowyoucandumpyouroldAndroidphoneandenjoyusingyouriPhone.1、Beforethetransfer,whatareyousupposedtodofirst?A．BefamiliarwithAndroidandiOSplatforms.B．CheckyourdataontheiPhoneandbackitup.C．Rememberthestepsmightvaryfromdevicetodevice.D．TumonWi-Fiandconnectthemwiththesamenetwork.2、Whatdoweknowaboutthe"MovetoiOS"App?A．ItisrequiredtobeinstalledonyouriOSdevice.B．ItisanappthattransfersdatafromAndroidtoiPhone.C．TheGoogleplaystoredevelopedthisappfreeofcharge.D．Youneedgrantpermissionstotheappbeforedownloadingit.3、Whichsectionofawebsiteisthisarticletakenfrom?A．Technology. B．Entertainment. C．Travel. D．Relationship.25．（10分）“YearsagowhenIwasattheGrandCanyon,Irememberedsomeonecominguptothecanyon’sedge,takingashotwithacameraandthenwalkingaway,like‘gotit–done’,barelyevenglancingatthemagnificentsceneinfrontofhim,”LindaHenkel,ascientistatFairfieldUniversity,UStoldLiveScience.Henkelwassurprisedbyhowobsessed(痴迷的)peoplearewithtakingpicturesthesedays-beforedinner,duringfriends’birthdayparties,onmuseumtoursandsoon.Theykeeptakingpicturesbecausetheythinkthatithelpsrecordthemoment,butasHenkel’slateststudyhasjustfoundout,thisobsessionmaypreventtheirbrainsrememberingwhatactuallyhappened,reportedTheGuardian.Inherstudy,Henkelledagroupofcollegestudentsaroundamuseumandaskedthemtosimplyobserve15objectsandphotograph15others.Thenextdaythestudents’memoryofthetourwastested,andtheresultsshowedthattheywerelessaccurateinrecognizingtheobjectsandtheyrememberedfewerdetailsaboutthemiftheyphotographedthem.‘‘Whenpeoplerelyontechnologytorememberthem—countingonthecameratorecordtheeventandthusnotneedingtoattendtoitfullythemselves,itcanhaveanegativeimpactonhowwelltheyremembertheirexperiences,”Henkelexplained.Butthereisalsoanexception:ifstudentszoomedintophotographpartofanobject,theirmemoryactuallyimproved,andthosewhofocusedthelens(镜头)onaspecificareacouldevenrecallpartsthatweren’tintheframe.Sobasically,thisstudyissayingthatconstantlytakingpicturescanharmyourmemory.Butshouldn’treviewingpictureswehavetakenhelpwakeupourmemories?Thisistrue,butonlyifwespendenoughtimedoingit.“Inordertoremember,wehavetoaccessandinteractwiththephotos,ratherthanjustcollectthem,”HenkeltoldTheTelegraph.However,previousresearchhasshownthatmostpeoplenevertakethetimetolookovertheirdigitalpicturessimplybecausetherearetoomanyofthemandtheyaren’tusuallyveryorganizedontheircomputers.1、WhydidtheauthormentionHenkel’striptotheGrandCanyonatthebeginning?A．Tocomplainaboutsometourists’badhabits.B．Togivesuggestionsonhowtoenjoyone’stour.C．Topointoutpeople’sobsessionwithtakingpictures.D．TodescribethebeautifulviewoftheGrandCanyon.2、WhatcanwelearnfromHenkel’sstudy?A．Reviewingpicturesalwayshelpspeoplebringbackmemorieseasily.B．Takingpicturesinamuseumtourhelpsstudentsrecognizeobjectsbetter.C．Peopleshouldspendmoretimetakingpicturesthanstudyingrealobjects.D．Picturesfocusingonthedetailsofobjectsprobablyimprovepeople’smemories.3、Theunderlinedword“it”inParagraph5probablyrefersto“________”.A．thecameraB．technologyC．theeventD．anobject4、Whatisthearticlemainlyabout?A．People’sobsessionwithtakingpicturesanditsinfluence.B．Possiblewaysofusingpicturestoimproveone’smemory.C．Greatharmtomemorycausedbytakingpicturesconstantly.D．Abelievablestudyintothenegativeimpactofliningcamerasoften.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）Zigfried,alittlemouse,blewhisbreathonthefrostywindowofthefarmhouseandrubbedittoseetheoutside.Stillnobodycame.Maybetoday,hethought1ItwasonlyafewdaysbeforeChristmasandhewaswatchingforamiracle(奇迹).Thisfarmhousehadbeen2toolong.Itneededafamily.Zigfried’s3madeanoise.Herealizedthathehadn’teatenanythingsinceyesterday.Hejumpedfromthewindowsill(窗沿),grabbeda4fromhishome,andwentnextdoortoFarmerMike’s.FarmerMike’shousehadbeenagreatplaceforthelittlemouse5thefarmermarriedawifewhohadacat.Zigfried6whenhethoughtofit.Helookedaroundcautiouslyashe7intotheroomwheregrainwasstoredandwasquite8ashefilledhisbagwithwheat.Hewasturningtoleavewhensuddenlyhe9,andwithoutthinkinghestartedtorunandluckily10thecat’spaws(爪子).ThenextafternoonZigfriedheardsomegoodnews:a11familywouldbemovingintothefarmhousesoon.Zigfried’sgrannywouldarriveonChristmasEveto12withhim.Hehopedthatthefamilywouldcomebeforehisgrannycame.Beforelong,acarcame13theroadleadingtothehouse,withbuttersandwiches,cheeseandchocolate.Zigfried’sChristmasmiracledidarrive!Thehousecame14thenextfewdays.Zigfried15everysinglehourofthem.16,thedaybeforeChristmaswhenhewasdrinkinghotchocolatewitha17smileatthedoorofhishome,heheardthe18ofthechildrenofthefamilyaboutwhattheymightgetforChristmas.What?Acat?The19frozeonhisface；hismouthfellwideopen.Afteralongwhile,heatlastfoundhisvoice:“Hey!WhoseChristmasmiracleisthis?”1、A．carefully B．excitedly C．hopefully D．proudly2、A．shabby B．noisy C．messy D．empty3、A．mouth B．nose C．stomach D．throat4、A．bag B．stick C．bowl D．coat5、A．although B．until C．whereas D．unless6、A．leapt B．sniffed C．trembled D．withdrew7、A．broke B．marched C．paced D．stole8、A．curious B．nervous C．pitiful D．sensible9、A．took B．released C．felt D．drew10、A．strongly B．irregularly C．slowly D．wildly11、A．escaped B．seized C．rubbed D．scratched12、A．close B．happy C．new D．young13、A．celebrate B．communicate C．compete D．compromise14、A．across B．from C．off D．up15、A．alive B．loose C．open D．still16、A．counted B．enjoyed C．missed D．wasted17、A．However B．Instead C．Moreover D．Therefore18、A．bitter B．forced C．polite D．satisfied19、A．introduction B．discussion C．comment D．debate20、A．blood B．smile C．tear D．sweat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）InChina,travelingbytrainisacommonwaytovisitnewplacesandgobacktoone’shometownduringholidays.ButintheUS,travelingbytrainisalmostanancienttradition…althoughitwasn’talwaysthatway.TheUSrailwaysystemstartedtogrowin1826,withmanyrailway1．(company)startingupandcompetingwitheachothertobuildnewrailwayroutes.Trainsbecameasymbolofprogress,withNewYorkCity’sGrandCentralStationbecomingamajor2．(culture)landmark.Buteventually,railways3．(replace)byhighwaysas“carculture”tookovertheUS.Chinawouldgoontoadopttrainsevenmorequicklyand4．(wide)thantheUS.China’srailwaynetworkconnectstheentirecountry,5．(allow)peopletotravelwithease.ThisisespeciallyobviousduringChunyun-whenChina’strainstationsarecrowdedwiththousandsofpeople6．aretryingtogethome.IhadnevertraveledbytrainuntilI7．(move)toChina.Myfirsttripbytrainwas8．BeijingtoTianjinbyhigh-speedtrain.Itwas9．(amaze)howquicklyIcouldgetthere-justhalf10．hour.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：在缺词处加一个漏词符号(^)，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：在错的词下画一横线，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。Myfavoriteproverbis“Afriendinneedisafriendindeed、”Itmeanthattruefriendsalwayscometoyouwhenyou’reintrouble、Lastterm,myfathermetwithatrafficaccident,buthisrightleggotinjuredseriously、Consequently,hereceivedtheoperationandIhadtolookafterhiminthehospital、Learnedaboutthis,LiLeiwasofferedtotakecareofmyfatherwithouthesitation、Healsohelpedmemakeupformylessons、Thanktohishelpandinspiration,Iwentthroughthedifficultyperiodandregainedconfidence、However,atruefriendalwayssparesnoefforthelpyouwhenyouareintrouble、Weallshouldtrytomakesogoodfriends、106第二节书面表达（满分25分）29．（25分）假定你是李华，你的英国朋友John正在学习汉语，希望你推荐一个适合他学习汉语的网站。请你根据以下内容，给他回复邮件。1．推荐网站;2.网站内容;3.提出希望注意：1.词数100左右；2.可适当增加细节，以使行文连贯。DearJohn,___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________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、D2、C3、B4、B5、C6、B7、A8、B9、A10、C11、D12、A13、A14、C15、B16、D17、A18、B19、C20、C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、C2、D3、A4、D22、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