Ⅰ. 阅读理解。
People in different countries like different kinds of music. Music has many forms. And most countries have a style of their own. For example, the USA is famous for jazz, which has become popular all over the world.
The history of jazz can be traced（追溯）back to the United States in the late 19th century. It is natural and free, and it’s different from classical music.
Jazz became popular music because of America. African Americans created jazz. At that time, African Americans worked long hours every day. They often sang when they were working. Singing made everyone happy. That was an early form of jazz. Music has been important in African Americans' lives because of their rich musical tradition. In the fields, they made up this kind of music. Soon, the music became a part of American music.
()1. What does the underlined word “forms” mean in Chinese in the first paragraph?
A. 表格 B. 表现 C. 种类
()2. Which kind of music is famous in the USA?
A. Jazz. B. Pop. C. Rock.
()3. Who made the music of jazz?
A. Rich Americans. B. African Americans. C. American musicians.
()4. Why did African Americans often sing when they were working?
A. Because singing was their work.
B. Because they liked music very much.
C. Because singing made them happy.

1.C 2.A 3.B 4.C