题目内容：
根据以下材料回答题 ItwasClark'sfirstvisittoLondonUndergroundRailway．Against36"adviceofhisfriends,hedecidedtogothereafter5o'clockintheafternoon．Thisisabadtimeto37inLondon,becausenumerouspeoplegohomefromwork38thishour．Hehadtojoinalong39ofpeoplewhowerewaitingfortickets．Whenhisturncame,hehadsomedifficultyinmakinghimself40bythemansellingtickets．However,hegottherightticket41theendand,byaskingpeoplethe42,healsofoundtherightplatform．Itwaspackedtight43people．Hedidnot44togetonthefirsttrain,buthewas45tomovenearertotheedgeoftheplatformsoastobeinabetter46togetonthenextone．
Whenthistraincamein,Clarkwas47forwardontothetrainbythe48ofpeoplefrombehind．Thedoorsclosedandthetrain49off．Hewasunabletoseethenamesofthestationswherethetrainstopped,butheknewthatthestationhewantedwasthesixth50alongtheline．Whenthetraingottothesixthstation,Clarkgotoff,feelinggoodthathis51hadbeensoeasy．Buthesuddenly52thathehadcometoastationhehadneverheardof．Heex-plainedhisdifficultytoamanwhowasstandingontheplatform．Witha53onhisface,theman54Clarkthathehadcaughtatraingoingintheopposite55．
第36题应选 A．an
B．some
C．any
D．the
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答案解析：