RobertToddDuncanwasbornin1903inthesoutherncityofDanville，Kentucky.Hismotherwashisfirstmusicteacher.Asayoungman，hecontinuedhismusicstudyinIndianapolis，Indiana.In1930，hecompletedmoremusicaleducati

　　RobertToddDuncanwasbornin1903inthesoutherncityofDanville，Kentucky.Hismotherwashisfirstmusicteacher.Asayoungman，hecontinuedhismusicstudyinIndianapolis，Indiana.

　　In1930，hecompletedmoremusicaleducationatColumbiaUniversityinNewYorkCity.ThenhemovedtoWashington.Forfifteenyears，hetaughtmusicatHowardUniversityinWashington.Atthattime，notmanyblackmusicianswereknownforwritingorperformingclassicalmusic.TeachingatHowardgaveDuncanthechancetosharehisknowledgeofclassicalEuropeanmusicwithamainlyblackstudentpopulation.Hetaughtspecialwaystopresentthemusic.ThesespecialwaysbecameknownastheDuncanTechnique.

　　Besidesteaching，Duncansanginseveraloperaswithperformerswhowereallblack.Butitseemedthathealwayswouldbeknownmainlyasaconcertartist.However，hislifetookadifferentturninthemiddle1930s.Atthattime，thefamousAmericanmusicwriterGeorgeGershwinwaslookingforsomeonetoplayaleadingpartinhisnewworkPorgyandBess.Themusiccritic(评论家)oftheNewYorkTimesnewspapersuggestedToddDuncan.Duncanhadalmostdecidednottotryforthepartasheknewitwouldnotbeeasytogetit.Buthechangedhismind.HesangapiecefromanItalianoperaforGershwin.HehadsungonlyafewminuteswhenGershwinofferedhimthepart.HebecamefamousbecauseofthepartinPorgyandBess.

　　ToddDuncangainedfameasanoperasingerandconcertartist.Buthisgreatestloveinmusicwasteaching.WhenhestoppedteachingatHoward，hecontinuedgivingsinginglessonsinhisWashingtonhomeuntiltheweekbeforehisdeath.

　　50．Whatisthispassagemainlyabout?

　　A．WhatRobertToddDuncanlovedmost.

　　B．HowRobertToddDuncanbecamefamous.

　　C．RobertToddDuncanandhisworksofmusic.

　　D．AbriefintroductiontoRobertToddDuncan.

　　51．AccordingtoParagraph2，whileteachingatHowardUniversity，Duncan________.

　　A．foundspecialwaystopresentmusic

　　B．openeddoorsforotherblackclassicalsingers

　　C．hadthechancetoknowmanyfamousblackmusicians

　　D．becameknownforwritingandperformingclassical music

　　52．WhathappenedtoDuncaninthemiddle1930s?

　　A．Hegaveupte