A、 American's art music.
B、 American' s street music.
C、 American' s black music.
D、 American' s classic music.

【正确答案】 A

【答案解析】信息明示题。短文中提到it is considered by many to be American’s art music．由此可知爵士乐被很多美国人认为是艺术音乐。故选A。

A、 Harmony and melody are from Africa and rhythm from Europe.
B、 Harmony and melody are from Europe and rhythm from Africa.
C、 Harmony and rhythm are from Africa and melody from Europe.
D、 Melody and rhythm are from Europe and harmony from Africa.

【正确答案】 B

【答案解析】事实细节题。短文中提到Jazz uses some European ideas of harmony and melody, but the rhythms are more African in orion．故选B。

A、 The player invents the music in advance.
B、 The player makes up the music while playing.
C、 A good jazz player plays the same music twice.
D、 It' s like hearing a piece of music that was written long ago.

【正确答案】 B

【答案解析】细节辨认题。短文最后一段提到爵士乐的另一个特征是演奏者在演奏的过程中创作音乐，而不是提前创作出来，所以选项A错误，B正确。短文中提到对于同一支爵士乐曲子，优秀的演奏者在第二次演奏时很少会用同样的方式。故C错误。短文最后一段倒数第二句还提到听爵士乐绝不像听一支很早之前被创作出来的曲子，所以选项D错误。故选B。