Passed from father to son, the music has not changed for eight centuries，and among the richer Naxi people, knowledge of this music showed that you were real gentleman.
A. a; a
B. the, 不填
C. 不填;a
D. the; the
网友回答
A. a; a
B. the, 不填
(答案→)C. 不填;a
D. the; the
解析：考查冠词题。这种音乐知识是很广泛的，所以是泛指，而knowledge又是不可数名词，故不填；a real gentleman一个真正地绅士。