AnUnforgettableLesson 　　HowcanweforgetthelessonMrZhanggaveuslastmonth? 　　MrZhangwastheonlyteacherwhoworkedover-agedinourschool.Heshouldhaveretiredfromteachinglastyear.Buthedidn'twanttoleavehisplatform,hisallstudents,andstaytilllastmonth.OnthemorningofApril22,Wednesday,hestoodatthegateoftheclassroomasusual.ThebellrangandMrZhangappearedontheplatform.Muchtooursurprise,hewaswearingthecoatheworeforthefirstclassafewyearsago.“Boysandgirls,IamsorrythisisthelastlessonIgiveyou...”Hewispered,tearscametohiseyes.Hearingsuchwords,allofuswereshocked.“Why?MrZhang.Whydidyousaythat?”ItturnedoutthatMrZhanghadsufferedlungcancer.Heknewaboutthatlongagobuthedidn'ttellusbecausehedidn'twantustoworryabouthim.Andnowthediseasehadgotworseandhehadtoreceivetreatment.Wedidn'tandcouldn'tbelieve! 　　Intheclass,MrZhangencourgedustostudydiligentlyandbegoodperonsinthefuture. 　　Thiswasmyunforgettablelesson.I'llkeepitinmindforever.