题目内容：
根据下面内容，回答题 Afterspendingaweekendawaywithmyadultson,IwassoimpressedbyhisgenerousheartthatIsenthimthisletter.
Dearson,
Iwanttothankyouforteachingmeavery（1）lessoninlifebythegreatexampleyouset.WhenwewereeatingatthatcafeinBondiandapersonwhohad（2）hishamburgerdidn'thaveenoughmoneytopayforit,withoutanyhesitation,youwentoverandputthe（3）$2intohishand.
Whenwewereleaving,youalsothrewafive-centcoinontothepavementandsaid（4）like,"Somekidwillreallyenjoyfindingthis."
Lastweek,ayoungman（5）meinthelineatapetrolstationdidn'thaveenoughmoneytopayforhispetrol.Iaskedthemoneycollector,"Howmuch（6）ishe?"Shetoldmehehadmeanttoput$15ofpetrolinhiscarbuthehadbeenlookingatthewronggaugeandhadputin15（7）,whichcametojustover$20.Thatisaneasymistake（8）bothgaugesrunfast.
SomethingmademethinkofyouandwhatyoudidthatnightatthecafeinBondi.Ihandedtheman$6.Hewasso（9）andsaid,"Butwhywouldyoudothisforme?"IjustsmiledasIthoughtofyou.
Thankyou,son,forteachingmethat"it'sbettertogivethanreceive".NowwhenIseeafive-centcoinonthe（10）andwanttopickitup,Ithinkofyouandleaveitthere,justincasesomekidwillgetakickoutoffindingit.
Lovealways,
Mum
第（1）题选 A．humorous
B．private
C．reasonable
D．valuable
参考答案：
答案解析：