根据短文完成下面的题MyUnforgettableTravelBesidesgoingbycartherearethreeotherwaystogetacrossthecountry：planestrainsandbuses．Airtravelisthemostexpensiveofth

　　根据短文完成下面的题

　　MyUnforgettableTravel

　　Besidesgoingbycartherearethreeotherwaystogetacrossthecountry：planestrainsandbuses．Airtravelisthemostexpensiveofthethreebutinmanywaystheeasiestandmostcomfortable．Therearehundredsofflightsadaycriss-crossingthecountryanditiseasytomakeanorder．Youwillgettoyourdestination(目的地)quicklyandfindtheservices(服务)attheairportsexcellent．Therewillbeconnectingbusservicestothecenteroftowncarrentalagenciesandporters(出租公司和搬运工)．

　　Travelingbytrainischeaperthanbyairplane．InthepasttrainservicewaspoorbutinrecentyearsthegovernmenthaschangedtheservicewithAMTRAKthenationalizedtrainsystem．Youcantravelfirstorsecondclass．Yourticketisforthejourneyonlysleepinganddiningconditionswillbeextra．Themostinexpensivewaytotravelisbybus．ContinentalrailwaysandGreyhoundcanbuyspecialticketsthatallowyouunlimitedtravelforacertainperiodoftime．Inthiswayyoucanstopalongthewaytovisittheplacesthatinterestyoumost．

　　Ifyoudotravellongdistancesbereadyforthetimechanges．Therearefourtimezones(时区)inthecontinentalUSAstartingontheEastCoastwithEasternStandardTime(EST)thenmovingwesttoCentralStandardTime(CST)MountainStandardTime(MST)．Ifyoutraveleasttowestyougainonehoureachtimeyouenteranewtimezone．

　　SeeingAmericabyCar

　　AgoodwaytoseetheUSAisbycar．Americanslovetheircarsandinthepastfiftyyearstheyhavedevelopedavastnetworkofroadsandfreewaystohelpthemreachtheirdestinations．

　　Asfewvisitorshavetheirowncarsrentingoneisthenextbestthing．Youwillneedavaliddriver’slicense(itisbesttohaveaninternationaldriver’slicense)andeitherinternationalcreditcards(信用卡)(DinersAmericanExpress)oradeposit(存折)．

　　Youshouldstartoutwithaworkingknowledgeoftheroad．Youtravelfromstatetostateandthiscanbeveryexcitingtoanewcomer．Forexampleinsomestatesitislegal(合法)toturnrightataredlightift