【Intheearlieststagesofman’sdevelopmenthehadnomoreneedofmoneythananimalshave．Hewascontentwithverysimpleformsofsheltermadehisownroughtoolsandweaponsandcouldprovidefoodandclothingforhimselfandhisfami】

　　Intheearlieststagesofman’sdevelopmenthehadnomoreneedofmoneythananimalshave．Hewascontentwithverysimpleformsofsheltermadehisownroughtoolsandweaponsandcouldprovidefoodandclothingforhimselfandhisfamilyfromnaturalmaterialsaroundhim．Ashebecamemorecivilizedhoweverhebegantowantbettersheltermoreefficienttoolsandweaponsandmorecomfortableandmorelastingclothingthancouldbeprovidedbyhisownneighborhoodorbytheworkofhisownunskilledhands．Forthesethingshehadtoturntotheskilledpeoplesuchassmithsleatherworkersorcarpenters．Itwasthenthatthequestionofpaymentarose．

　　Atfirsthegotwhathewantedbyasimpleprocessofexchange．Thesmithwhohadnotthetimetolookafterlandorcattlewasgladtotakemeatorgrainfromthefarmerinexchangeforanaxeoraplough．Butasmoreandmoregoodswhichhadnofixedexchangevaluecameonthemarketexchangebecametoocomplicatedtobesatisfactory．Anotherproblemarosewhenthosewhomadethingswantedtogetstocksofwoodorleatherorironbuthadnothingtoofferinexchangeuntiltheirfinishedgoodswereready．

　　Thusthedifficultiesofexchangeledbydegreestotheinventionofmoney．Insomecountrieseasilyhandledthingslikeseedsorshellsweregivenacertainvalueandthefarmerinsteadofpayingthesmithforanewaxebygivinghimsomemeatorgraingavehimsomanyshells．Ifthesmithhadanyshellsleftwhenhehadboughthisfoodhecouldgetstocksoftherawmaterialsofhistrade．Insomecountriesquitelargethingssuchascowsorcamelsorevenbigflatstoneswereusedfortrade．Laterpiecesofmetalbearingvaluesaccordingtotherarityofthemetalandthesizeofthepiecesorcoinswereused．Moneyasweknowithadarrived．

　　1．Exchangeofgoodsbecamedifficultbecause_________．

　　A．manbecamemorecivilized

　　B．smithsbegantolookafterlandorcattleintheirsparetime

　　C．moreandmoregoodswhichhadnofixedexchangevaluescametothemarket

　　D．farmershadn’tenoughgrainormeattoprovideforskilledworkers

　　2．Moneywasnotuseduntil_______．

　　A．paperwasinvented

　　B．peoplepracticedasimpleprocessofexchange

　　C．nothingcouldbeofferedinexchange

　　D．theexchangeofonethi