music comes in many forms. most countries have a style of their own. -1- the turn of the century when jazz was born, america had no prominent -2- ofits own.no one knows exactly when jazz was -3- ,or by whom.but it began to be- 4- in the early 1900s.jazz is american contribution to -5 -music.
in contrast to classical music, which- 6 -formal european traditions, jazz is spontaneous and free form.it bubbles with energy, -7 -the moods, 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 to southern 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 the cemetery.in new orleans, a band often accompanied the- 16- .on the way to the cemetery the band played slow, solemn music suited to the occasion. -17 -on the way home the mood changed.spirits lifted.death had removed one of their- 18 -,but the living were glad to bealive.the band 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.