单选题
Music comes in many forms; most countries have a style of their own. At the turn of the last century, (51) jazz was bona, America had no prominent (52) of its own. No one knows exactly when was invented or by whom. But it began to be (53) in the early 1890s. Jazz is America's contribution to (54) music. In contrast to classical music, which (55) formal European traditions, jazz is spontaneous and free in form. It bubbles with energy, (56) the moods, interests, and emotions of the people. In the 1920s' jazz (57) like America. And so it does today. The (58) of the music are as interesting as the music itself. American Negroes, or blacks, as they are called today, were the jazz pioneers. They were brought to the Southern states (59) slaves. They were sold to plantation owners and forced to work long hours. When a Negro died, his friends and relatives (60) a procession to carry to body to the cemetery. In New Orleans, a band often accompanied the (61) . On the way to the cemetery the band played slow, solemn music, suited to the occasion. (62) on the way home the mood changed. Spirits lifted. Death had removed one of their numbers, but the living were glad to be (63) . The band played (64) music, improvising on both the harmony and the melody of the tunes (65) at the funeral. This music made everyone want to dance. It was an early form of jazz.