Jawaban:

1. Rock music is played and listened in almost every countries in the world.

2. The music that developed in the early 1950's was called Rock and Roll

3. Elvis Presley was a young singer from Tennessee

4. After he appeared on nation-wide television, his singing and performing style came to mean rock and roll all over the world

5. Bill Haley and The Comets

6. Yes, I agree with the statement that says rock is become mainly the music of the youngsters because the beat, the sound and the lyric is easy to understand

7. The 1970's were the time of big developments in the rock industry

Maaf ya kl slh, semoga membantu :)