Somedayinthefuturewemaynotneedtohavemoneyinourpockets．Islifeeasierwhenpeopledon'tneedtocarryanymoneyatall？Ismoneyheavytocarry？Isitsafetocarrymoney？Maybeinthefutureeachofuswillhaveonlyonesmallcredi

　　Somedayinthefuturewemaynotneedtohavemoneyinourpockets．Islifeeasierwhenpeopledon'tneedtocarryanymoneyatall？Ismoneyheavytocarry？Isitsafetocarrymoney？Maybeinthefutureeachofuswillhaveonlyonesmallcreditcard（信用卡）．Wewilluseitinsteadofmoneytobuyallthethings．

　　Ofcoursewemaystillhavesomeofthesameproblemswithcardswenowhavewithmoney．Forexample，welosemoneyfromtimetotime．Maybewewilllosethecards．Maybesomeonewilltakethecards．Someonemayevenmakeacardthatlookslikeourcards．Sincewecan'tbuyanythingwithoutourcards，thecreditcardsmaybenobetterthanmoney．

　　Istheresomethingeasiertousethancreditcards？Eachofushasathumbprint（拇指指纹）．Notwothumbprintsarethesame．Maybesomedaythegovernmentwillkeeppeople'sthumbprintswithanumber．Whenyouwanttobuysomething，youwillputyourthumbonamachineoracomputer．Eachstoreorbusinesswill posses one．Everyone'sthumbprintswillbeinthecomputer．Itwillbedifficulttoloseourthumbprints!Itwillbedifficultforsomeonetostealitortomakeonelikeit．

　　56．Thewriterprobablyagreesthatcreditcardsare___tocarrythanmoney．

　　A．heavier

　　B．easier

　　C．moredifficult

　　57．Whatmaybeaproblemwithcreditcardsinthefuture？___

　　A．Wemaylosethecardsfromtimetotime．

　　B．Wewon'tbeabletomakeenoughcards．

　　C．Wemaynotknowhowtousethecards．

　　58．Somedaythegovernmentmaykeeppeople'sthumbprintswitha___．

　　A．sign

　　B．note

　　C．number

　　59．Theunderlinedword"posses"probablymeans"___"inEnglish．

　　A．lend

　　B．have

　　C．sell

　　60．Inthewriter'sopinion，it'llbethebestwaytobuythingswith___inthefuture．

　　A．money

　　B．creditcards

　　C．thumbprints．