Blues ★It was created in the early 19th century by black musicians by (1)using_folk_songs of black Americans.

★Popular as it was, it lacked variety and was too sad and slow to dance to. Early jazz ★It sprung up after blues, being faster and livelier.

★Louis Armstrong was one of the fathers of jazz and he was (2)famous/known for his ability to change the music while playing jazz to reflect his feelings.

★It's (3)typical of jazz that when it is being played the performers can adapt the music. R&B ★From the early 1930s to the early 1950s, R & B gradually took the (4)place of traditional jazz.

★R&B is a combination of the fast pace of jazz and the older blues sound. Rock and roll ★During the early 1950s, there (5)appeared one particular style of R&B called rock and roll.

★It was Big Joe Turner who recorded one of the very first rock and roll songs.

★"Rock Around the Clock" made rock music popular (6)worldwide.

★In the early 1950s, Sam Philips, a record company owner, sought to bring rock music to (7)white_audiences.

★Still known as "the King of Rock and Roll" today, Elvis Presley made a (8)great_contribution to rock and roll. Pop music ★In the 1960s, the Beatles (9)introduced Western pop music to audiences around the world.

★In many ways, the Beatles were (10)pioneers for what was to come. 　　

　　Ⅰ.单词拼写

　　1．The current trend (趋势) of prices is still rising.

2．If you think you have a medical problem, seek (寻求) professional help from your local family doctor.