Thinkoflifeasagameinwhichyouareplayingwithfiveballsintheair.Younamethemwork,family,health,friendsandspiritc(精神)andyoukeepallofthemintheair.Youwillsoonunderstandthatworkisarubberball.Ifyoudropit,itwillbounce(弹跳)back.

　　Buttheotherfourballs,family,health,friendsandspirit,aremadeofglasses.Ifyoudroponeofthese,theywillbebroken.Theywillneverbethesame.Youmustunderstandthatandtrytohavebalanceinyourlife.How?

　　Don'tlookdownonyourworthbycomparingyourselfwith'others.Itisbecausewearedifferentandeachofusisspecial.

　　Don'tletotherpeoplesetgoalsforyou.Onlyyouknowwhatisbestforyourself.

　　Don'tgiveupwhenyoustillhavesomethingtogive.(83)Nothingisreallyoveruntilthemomentyoustoptrying.

　　Don'tbeafraidtofightdifficulties.Itisbytakingchancesthatwelearnhowtobebrave.

　　Don'tshutloveoutofyourlifebysayingit'simpossible.(84)Thequickestwaytoreceiveloveist0giveit;thefastestwaytoloseloveistoholdittootightly(紧紧地);thebestwaytokeeploveistogiveitwings.

　　Don'trunthroughlifesofastthatyouforgetnotonlywhereyou'vebeen,butalsowhereyouaregoing.

　　Don'tbeafraidtolearn.Knowledgeisweightless.It'satreasure(珍宝)youcanalwayscarryeasily.

　　Don'tusetimeorwordscarelessly.Youcan'tgetthemback.

　　Lifeisnatacompetition,butatrip,stepbystep.

　　Yesterdayishistory,tomorrowisamystery(秘密),andtodayisagift:that'swhywecallit“thepresent”,

　　A.根据短文内容简要回答问题.

　　81.Whatarethefiveballsoflife?

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　　82.Pleasesaysomethingaboutknowledgeaccordingtothepassage.

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　　B．将短文中划线的两个句子译成汉语.

　　83．____________________________________.

　　84．____________________________________.

　　C.请给短文拟一个适当的标题.

　　85．___________________________________.