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Passage1BillionsofdollarshavealreadybeenspentinplanninghowtosetfootonMars.Sowhydowewanttogotheresobadly?1._______DutchorganizationMarsOnewantstoputpeopleonMarsby2027.Theresearcherssayitisjustthenextstepinhumancuriosity（好奇心）.“WhydidColumbustravelwest?WhydidMarcoPoloheadeast?2._______”theirwebsitesays.MarsOnealsothinksMarsexplorationwillimprovethedevelopmentofrecycling,solarenergy(太阳能),foodproductionandevenmedicaltechnology.BillionairebusinessmanElonMuskrunsacompanyintheUnitedStates.ItsnameisSpaceX.3.________Musk,whowasborninSouthAfricabutisnowaUS-Canadiancitizen,agreesthatcuriosityplaysapart.ButhismainreasonforgoingtoMarsisthesurvival(生存)ofthehumanrace.Tosurvive,wemustlearntolivesomewhereotherthanEarth.4.________In2011,alongwithRussia,Chinaplannedtosendaprobe(探测器)totheplanet.AnotherprobewillreachMarsby2021.USspaceagencyNASAisalsoexcitedtogettoMars.5._______“Futureexplorationwillfindevidence（证据）oflife,answeringoneofthebiggestmysteriesoftheuniverse(宇宙):DoeslifeexistbeyondEarth?”theNASAwebsitesays.Accordingtoit,MarsandEarthhavelotsofthingsalike.ExploringMarsalsohelpsuslearnmoreaboutourownplanet’shistoryandfuture.A.JapanesealsohopestodoaprojectonMars.B.Well,differentorganizationshavedifferentreasons.C.Itsfinalgoalistohelphumansliveonotherplanets.D.ChinahasalongperioddreamofreachingMarsoneday.E.TheremaybenewspeciesonMarswhichcansurpriseusalot.F.AndNASAthinksithelpshumanslearnmoreabouttheuniverse.G.Becausethatadventuremakeshumansfindnewplacestoexplore.Passage2Aninternationalfreightrailwaynetwork(货运铁路网)isconnectingChinatocitiesacrossEurope.1._______2,000yearsago,ittookayeartogetgoodsfromChinatoEuropealongtheancientsilkroad.Buttoday,goodsfromChinacanreachLondonbyrailinjust14days.Ittakeslesstimethanbefore.YiwuisacitythatislocatedinChina’sZhejiangProvince.InYiwu,itoncetooktwohoursbytheroadtosendEuropeangoodstothenearestseaport(海港).2._______Buttoday,anewfreightraillinkconnectsYiwutoEuropealonganancienttraderoute.Yiwurailwaystationisabigfreightstationnow.3._______It’spartofthemulti-billion-US-dollarBeltandRoadInitiative(倡议).Itissetupinordertodeveloptheinternationaltrade.4._______Itspreadsacross13,000kilometersthroughFrance,Germany,Poland,Belarus,RussiaandKazakhstan.Alongtheway,thetraintransfers(换乘)threetimesbecauseofdifferenttrackgauges(轨距规)inChina,EuropeandRussia.Withtransfersonlytaking1minutepercontainer(集装箱),theraillinkcutEurope-Chinatransportationtimebyhalf.5._______NowforeignproductsareeasierandcheapertobuyforChinese.A.SilkRailroadisveryimportant.B.Itiscalledasthenew“SilkRailroad”.C.ItwilltakealongtimetotraveltoYiwuCity.D.Thenittookatwo-monthjourneyacrosstheoceans.E.ItbegantotransportgoodsoverlandtoEuropein2014.F.AnditonlytakespeoplethreeweekstogetgoodsfromEurope.G.TheYiwu-Madridrailwayisthelongestraillinkinthewholeworld.Passage3Inmanybigcitiesintheworld,manypeoplethinktheoveruseofcarsisoneofthemaincausesofairpollution.Carsinthefuturemustbeenvironment-friendly.1.______Someexpertsthinkthattoday’scarsareintroublebecausetheyusetoomuchpetrol(汽油).2._____Thecaroftomorrowwillbemadewithoutairconditioning.Thetomorrow’scarwillbeverysmall,sothatonlytakesupverylittleroom.Itneedn’thaveapollutioncontrolsystembecauseitwon’tusepetrol.3.______Veryfewpeoplewillbekilledinaccidentsbecausethetopspeedwillbeverylow.However,wearealsowarnednottoaskforprettycolorsbecausethecarswillcomeingreyonly.4._______Theyaresurethatpeoplewillbehappierinthefuture.Theythinkthatallourproblemswillsoonbesolvedbycarcompanieswiththeproductionofthesupercar(超级汽车).5.Thesupercarwillhavefourrooms,TVs,runningwater,heat,airconditioningandmaybeaswimmingpool.Largefamilieswilltravelonlongtripscomfortably.Thesupercarwillnotpollutetheenvironmentbecausetheywillrunonwater.A.What’stheproblem?B.Whatwillcarsbelikeinthefuture?C.Othercarexpertsdonotholdthesameidea.D.Ithinkthecaronthefuturewillbemoreuseful.E.Infact,thiscarwillbepushedbycleanenergy.F.Theysaythecarofthefuturewillbemuchsmaller.G.Tomorrow’scarswillbesmaller,faster,andmorecomfortable.Passage4Smartwristband(智能手环),anewwelcomingproduct,ischangingourlifestyle.Havingasmartelectronicsgadget（小装置）onyourhandcanreallymakehugedifferences.Sofromnowonitwillbeagreatfuntomaintainyourhealthinamoreinterestingway.1.______Andtherearealsomanydifferentbrandstochoose,suchasAppleorHuawei.Herearethereasonswhypeoplechooseawristband.2._______Thewristbandcanalsobeconnectedtothemobilephone.Youareabletouseittoanswerthephone,butatraditionalwatchcanneverdothat.Besides,thesmartwristbandlooksfascinating.3.______Weoftenseeteenagerswearingwristbands.Thirdly,atpresentmanypeoplehaverealizedtheimportanceofhealth.Somepeopleplaysportseverydaytokeephealthy.4.______Thewristbandshowstheresultseverydayandyou’llknowwhetheryouachieveyouraimornot.However,someparentsarestillagainstusingit.5.______Theythinktheteenagersareundertheradiation(辐射)allthetime.Eachcoinhastwosides.Useitornot,it’suptoyou.A.It’ssoexpensivethatfewpeoplecanbuyit.B.Firstofall,itcantellthetimelikeanormalwatch.C.Awristbandishelpfultoknowhowfartheyhaverun.D.It’sverypopularamongteenagersbecauseit’sco