Music comes in many forms; most countries have a style of theirown. 1_ the turn of the century when jazz was born, Americahad no prominent 2_ ofits own.No one knows exactly when jazzwas 3_ ,or by whom.But it began to be 4 _in the early1900s.Jazz is Americas contribution to 5_ music.In contrast toclassical music, which 6 _formal European traditions, jazz isspontaneous and free-form.It bubbles with energy, 7_ themoods, interests, and emotions of the people.In the 1920s jazz 8 _like America, and 9_ it does today.The 10_ of this music are as interesting as the music 11_ .American Negroes, or blacks, as they are called today, were the jazz 12_ .They were brought toSouthern States 13_ slaves.They were sold to plantation owners and forced to work long 14 _.When a Negro died his friend and relatives 15_ a procession to carry the body to thecemetery.In New Orleans, a band often accompanied the 16_ .On the way to the cemetery theband played slow, solemn music suited to the occasion. 17_ on the way home the moodchanged.Spirits lifted.Death had removed one of their 18_ ,but the living were glad to bealive.Theband played 19_ music, improvising( 即兴表演 ) on both the harmony andthe melody of the tunes 20_ at the funeral.This music made everyone want to dance.It was an early form of jazz. 1.A.By B.At C.In D.On 2.A.music B.song C.melody D.style 3.A.discovered B.acted C.invented D.designed 4.A.noticed B.found C.listened D.heard 5.A.classical B.sacred C.popular D.light 6.A.forms B.follows C.approaches D.introduces 7.A.expressing B.explaining C.exposing D.illustrating 8.A.appeared B.felt C.seemed D.sounded 9.A.as B.so C.either D.neither 10.A.origins B.originals C.discoveries D.resources 11.A.concerned B.itself C.available D.oneself 12.A.players B.followers C.fans D.pioneers 13.A.for B.as C.with D.by 14.A.months B.weeks C.hours D.times 15.A.demonstrated B.composed C.hosted D.formed 16.A.demonstration B.procession C.body D.march 17.A.Even B.Therefore C.Furthermore D.But 18.A.number B.members C.body D.relations 19.A.sad B.solemn C.happy D.funeral 20.A.whistled B.sung C.presented D.showed