Doyourememberwhatyouweredoing? 　　Peopleoftenrememberwhattheyweredoingwhentheyheardthenewsofimportanteventsinhistory.IntheUnitedStates,forexample,manypeoplerememberwhattheyweredoingonApril4,1968.ThiswasoneofthemostimportanteventsinmodernAmericanhistory.Onthisday,DrMartinLutherKingwaskilledinthecityofMemphisinAmerica.Althoughsomepeoplemaynotrememberwhomurderedhim,theyrememberwhattheyweredoingwhentheyheardabouttheevent. 　　Eventhemosteverydayactivitiescanseemimportant.RobertAllenisnowover40.Hewasjustastudentatthattime,butherememberswhathewasdoingwhenheheardthenews.“Itwasabright,sunnyday.”Robertremembers.“Wewerehavingfunintheplaygroundwhenthebellrang.Ourteacheraskedustostopwhatweweredoingandlisten.Hetoldusthenews:‘DrMartinLutherKingdiedjust10minutesago!’Wecouldn’tbelieveit!”Schoolclosedfortheday,andRobertandhisfriendswalkedhometogetherinsilence. 　　DrMartinLutherKing’smurdertookplaceaboutthirtyyearsago,beforemanyAmericanswereborn.However,inmorerecenttimes,mostAmericansrememberwhattheyweredoingwhentheWorldTradeCenterinNewYorkwasdestroyedbyterrorists.Eventhedate----September11,2001----hasmeaningtomostAmericans. 　　Notalleventsinhistoryareasterribleasthis,ofcourse.ManyAmericanaalsosaytheyrememberwhattheyweredoingwhenmanfirstwalkedonthemoononJuly20,1969.Inmorerecenthistory,mostChineserememberwhattheyweredoingwhenYangLiweibecamethefirstChineseastronautinspace.YangwentintospaceonOctober15,2003.HisflightaroundtheEarthlastedabout22hours.Whenhereturned,hebecameanationalheroinChina,andbecamefamousallovertheworld.