【SamuelLanghorneClemens，morecommonly（46）___（know）asMarkTwain，wasbornonNovember30，1835inFlorida．Twainisconsidered（47）___greatestauthorandhumoristofthe19th-centuryAmericanliterature（文学）．In1839theC】

　　SamuelLanghorneClemens，morecommonly（46）___（know）asMarkTwain，wasbornonNovember30，1835inFlorida．Twainisconsidered（47）___greatestauthorandhumoristofthe19th-centuryAmericanliterature（文学）．

　　In1839theClemensfamilymovedtoHannibal，Missouri，ontheMississippiRiverwherehewasbrought（48）___．Likemanyauthorsofhisdayhehadlittleformaleducation．Hiseducationcamefromtheprintshopsandnewspaperoffices（49）___heworkedasayouth．In1853TwainleftHannibaltotravel．OnatriptoNewOrleanshepersuadedariverboatpilot（50）___（teach）himhisskill．Bythespringof1859Twainwasalicensedriverboatpilot．

　　Aftera（n）（51）___（success）attemptatgoldandsilvermininghejoinedthestaffofanewspaperinVirginiaCity，Nevada．HefirstwroteunderthepennameMarkTwainin1863．

　　Hecontinuedtotravelasareporterforvariousnewspapers，andin1869histravellettersfromEurope（52）___（collect）intothepopularbookTheInnocentsAbroad．Between1873and1889hewrotesevennovels（53）___（include）hisMississippiRiverbooks．（54）___Twain'slifeandcareerprogressedhelostmuchofthehumorousstyleofhisearlieryears．Whatwasexpressedmoreandmoreinhislaterworkswas（55）___humanbeingsareselfish．EvensoTwainisbestrememberedasagreathumorist．