UNIT4单元主题训练Ⅰ.阅读理解eq\a\vs4\al(2022·广州市阶段测试)Transportationshapestheworld:alongwithcommunications,itformsaglobalnetthatconnectspersontoperson,citytocity,andcountrytocountry.Transportationroutesaswellasvehiclesarevitaltothefunctioningandspreadofeverycivilisation.Acountry'seconomydependsonreliabletransportation.Citiesspreadoutalongroads,rivers,andrails；sodoesinformation.Untilthe20thcentury,theserouteswereconfinedtolandorwater.Withtheinventionofthepoweredflight,theairbecameanopenroadaswell.Theearliestwayoftravellingwasundoubtedlybyfoot,andhumans'earliestmeansoftransportinggoodswascarryingloadsontheirbacksorshoulders.By4000BC,peoplewereusingdomesticatedanimalsfortransport,amethodgreatlyimprovedinsomepartsoftheworldbytheinventionofthewheel,probablyfirstdevelopedaround3500BC.Untilthe19thcentury,animalsweretheenginesoflandtransportation.Butwiththeinventionofthesteamengineandtheinternalcombustionengine,railroadsandautomobilesrevolutionizedtravelandtrade.Millionsofcarsandtruckstraveltheworldtoday.Watertransporthasalwaysbeenafastandefficientmodeoftravel,andeventodayitremainsaprimarywayoftransportationofheavygoods.Theimportanceofwaterwaystohumancivilisationcanbeseenonanymap：almostalloftheworld'smajorcitiesarelocatedoncoastlinesorrivers.Asearlyas7000BC,peoplewerebuildingcanoes.Untilthe1950s,shipswerethechiefmeansofoverseaspassengertravel.AlthoughtheMontgolfierbrotherstookflightinballoonsinthe18thcentury,airtravelwasnotpracticaluntiltheinventionofthepoweredflightbytheWrightbrothersin1903.Withintenyears,thecommercialairtransportationbusinessbegan.Sincethe20thcentury,high-speedrailhasbecomeanotherconvenientwayoftravel.By2019,morethantwo-thirdsoftheworld'soperationlengthofhigh-speedrailwasinChina,whichmeasured35,000km,andChineseoperationlengthofhigh-speedrailisexpectedtoreach38,000kmby2025.语篇解读：本文主要介绍了世界交通运输业的发展历史。人类最早的运输方式是人力运输，随着技术的进步，逐渐发展成为水运、空运、铁路运输等多位一体的综合运输体系；中国高铁的发展更为世界交通运输史增添了新的篇章。1．Whatisthepassagemainlyabout?A．Technologicaladvancementsintransportovertime.B．Th