填空题 dance interest roots south instrument form music voice Jazz, the 1____of the American Negro, first became recognizable as a separate 2____of music towards the end of the 19th century in New Orleans, a city in the 3____of the United States of America. About 1910 dance musicians began using jazz phrases and today most 4____ music includes many such phrases. During the last ten years jazz has enjoyed a tremendous revival of 5____. The instruments used were trumpets, clarinet, guitar, and drums. In the early days the piano was added and then saxophones and later still other 6____were introduced into jazz bands. The fundamentals of jazz are: (a) an instrumental style based on the imitation of the human 7____ ; (b) a melodic style where major and minor keys are often undetermined; (c) a rhythm which has its 8____in Africa; (d) improvisation, where each musician varies the melody from performance to performance.