Aroundtheworldmoreandmorepeoplearetakingpartindangeroussportsactivities.Ofcourse,therehavealwaysbeenpeoplewhohavelookedforadventurethosewhohaveclimbedunknownpartsoftheworldorsailedinsmallboatsacrossthegreatestoceans.Now,however,therearepeoplewhoseekanimmediatethrill,ariskyactivity,whichmayonlylastafewminutesorevenseconds. 　　Bungeejumpingisagoodexampleofsuchanactivity.Youjumpfromahighplace200metersabovethegroundwithanelasticropetiedtoyourfeet.Youfallatupto150kilometersanhouruntiltheropestopsyoufromhittingtheground.Itisestimatedthattwomillionpeoplearoundtheworldhavenowtriedbungeejumping. 　　Whydopeopletakepartinsuchactivitiesasthese?Somepsychologistssuggestthatitisbecauselifeinmodernsocietieshasbecomesafeandboring.Inancienttimes,people'sliveswereconstantlyunderthreat.Theyhadtogooutandhuntforfood.Diseasescouldnoteasilybecured,andtherewasacontinuousbattleforsurvival. 　　瀛椾覆7 　　Nowadays,accordingtomanypeople,lifeofferslittleexcitement.Theyliveandworkincomparativelysafeenvironments;theybuyfoodinshops;therearedoctorsandhospitalstolookafterthemiftheybecomeiii.Itisnecessaryforsomeofthesepeopletoseekdangerinactivitiessuchasbungeejumping. 　　Theword"sport"firstmeantsomethingthatpeopledidintheirfreetime.Lateritoftenmeanthuntingwildanimalsandbirds.Aboutahundredyearsagothewordwasfirstusedfororganizedgames. 　　Thisistheusualmeaningofthewordtoday.Peoplespendalotoftheirsparetimeplayingfootball,basketball,tennisandmanyothersports.Suchpeopleplaybecausetheywantto.Afewpeoplearepaidforthesporttheyplay.Thesepeoplearecalledprofessionalsportsmen.Theymaybesportsmenforonlyafewyears,butduringthattimethebestonescanearnalotofmoney. 　　Forexample,aprofessionalfootballerinEnglandearnsmorethan30,000poundsayear.Thestarscanearnalotmore.Internationalgolfandtennischampionscanmakemorethan50,000poundsayear.Ofcourse,onlyafewsportsmencanearnasmuchmoneyasthat. 　　Itisonlypossibleinsportsforindividuals,likegolf,tennisandmotorracing.Perhapsthemostsurprisingthingaboutsportsmenandmoneyisthis:thestarscanearnmoremoneyfromadvertisingthanfromsports.Anadvertisementforsportsequipmentdoesn'tsimplysay,"Buyourthings".Itsays,"Buythesameshirtandshoesas..."Famoussportsmencanevenadvertisethingslikewarchesandfood. 　　瀛椾覆4 　　Theyallowthecompaniestousetheirnameoraphotographofthemandtheyarepaidforthis.Sportisnolongerjustsomethingforpeople'ssparetime. 　　ThePowerOfHumor瀛椾覆7 　　Peopleliketobeconsideredhumorous,butfewofusactuallyhavethesenseofhumorwehopewehave.Somepeople,ontheotherhand,maywonderwhyweshouldbothertobehumorous.Thesepeople,Iamafraid,donotknowthepowerofhumor.Asenseofhumorcanhelpyoubecomeasuccessfulspeaker.Wecannoticethatthereisnogreatspeakerintheworldwhoisnothumorous.Oneoftwohumorousremarkscanmaketheaudiencelaugh,makingyourlectureanenjoyableone.Asenseofhumorcanhelpyouwinalotoffriends.Ifyouarehumorousyouwillalwaysattractalotofpeoplearoundyou.Asenseofhumorcanhelptoeasethetensionbetweenpeople.Whenpeopleareabouttoquarrel,ahu