For question 11-15,choose your answer from below

a. ling lun
b. emperor huang-ti
c. lu system
d. ya yiieh
e. yin yang

11. it is one of the chinese folk music
12. an emperor during 2697 bce
13. the theory of natural duality like male-female relationship
14. a Chinese musical legend
15. what is the system Chinese music? ​