| A. expressed B. tradition C. continues D. effects E. discovered |
The word 'rock and roll' probably came from the black churches in the South, where people sang and danced to the strong rhythms. At the same time, whites were playing country music. They went on with their of dancing music and slow songs that told sad stories. The singers played with string instruments such as fiddles and guitars.
During this time blues and country musicians had some on each other. The birth of the electric guitar changed country and blue music in the 1940s. The sound of the electric guitar became the sound of rock and roll. No one thinks of early rock and roll without thinking of Elvis Presley (埃维斯·普利斯里，美国著名摇滚明星), the 'King of Rock and Roll'. Rock music to develop, but the heart and soul of rock is the same heart and soul that Elvis_ .
