题目内容：
"Time,"saystheproverb,"ismoney"．Thismeansthateverymomentwell-spentmayputsomemoneyintoourpockets． Ifourtimeisusefullyemployed,itwilleitherturnoutsomeusefulandimportantpieceofworkwhichwillfetchitspriceinthemarket,or51．Itwilladdtoourexperienceandincreaseourcapacitiessoastoenableustoearnmoneywhentheproperopportunitycomes．Letthose,whothinknothingofwastingtime,rememberthis．
Ourlifeisnothingmorethanourtime．Tokilltimeisthereforeaformofsuicide．52．Weareshockedwhenwethinkofdeath,andwesparenopains,notrouble,andnoexpensetopreservelife．
53．Butwearetoooftenindifferenttothelossofanhourorofaday,forgettingthatourlifeisthesumtotalofthedaysandofthehourswelive．Adayoranhourwastedisthereforesomuchlifeforfeited．
Ourlifeisabriefspanmeasuringsomeseventyoreightyyearsinall．
Butnearlyonethirdofthishastobespentinsleep;someyearshavetobespentoverourmeals;someinmakingjourneysonlandandvoyagesbysea;someinmerry-making;someinwatchingoverthesick-bedsofournearestanddearestrelatives．
Nowifalltheseyearsweretobedeductedfromthetermoverwhichourlifeextends,weshallfindabouttwentyorthirtyyearsatourdisposalforactivework．54．Whoeverremembersthiscanneverwillinglywasteasinglemomentofhislife．
Alltimeisprecious;butthetimeofourchildhoodandofouryouthismorepreciousthananyotherportionofourexistence．55．Forthosearetheperiodswhenalonewecanacquireknowledgeanddevelopourcapacities．
Ifweallowthesemorninghoursoflifetoslipaway,weshallneverbeabletorecouptheloss．Justasmoneylaidoutatinterestdoublesandtreblesitselfintime,sotheprecioushoursofchildhoodandyouth,ifproperlyused,willyieldusincalculableadvantages．
第（51）题答案
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