[单项选择]Rock music was (original) (a mixture of) country music and (rhythm) (and) blues.


A. original
B. a mixture of
C. rhythm
D. and

Passage Two Country music is an American popular-music style. In its current form, country music is a combination of two separate musical traditions: the styles of the Southeastern states and the music of the Southwest, especially Texas. Both styles influenced and were influenced by the blues and by the black rural dance music. The first country artists to be widely known achieved popularity in the late 1920s. The music of these performers was heard throughout tile south during the 1920s and 30s on radio programs. By the 1950s, country music had become a significant force in pop music. Regular appearances on the radio show made stars of many performers. The singer-songwriter Hank Williams wrote four million-seller songs in 1950, seven in 1951, and four more in 1953. By the 1970s, "some country musicians began combining country music with electric instruments, creating a country rock sound.

Passage Two
Country music is an American popular-music style. In its current form, country music is a combination of two separate musical traditions: the styles of the Southeastern states and the music of the Southwest, especially Texas. Both styles influenced and were influenced by the blues and by the black rural dance music.
The first country artists to be widely known achieved popularity in the late 1920s. The music of these performers was heard throughout tile south during the 1920s and 30s on radio programs.
By the 1950s, country music had become a significant force in pop music. Regular appearances on the radio show made stars of many performers. The singer-songwriter Hank Williams wrote four million-seller songs in 1950, seven in 1951, and four more in 1953.
By the 1970s, "some country musicians began combining country music with electric instruments, creating a country rock sound.