（1）Which kind of music needs high music skills？
A.Heavy music.
B.Classic music.
C.Hip-hop music.
（2）When did opera music first come out？
A.In the 1600s.
B.After World War II.
C.In the 19 century.
（3）What kind of music is strong and complex？
A.Dance music.
B.Jazz music.
C.Opera music.
（4）How many kinds of music does the speaker mainly talk about？
A.Four.
B.Five.
C.Six.