No matter how frequently ， the works of Beethoven still attract people all over the world.
A. performed
B. performing
C. to be performed
D. being performed
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(答案→)A. performed
B. performing
C. to be performed
D. being performed
解析：A 考察省略表达。句义：不关贝多芬的作品被演奏多少遍，它依然能够吸引世界各地的听众，在状语从句中，如果从句的主语和主句的主语一直，且含有Be动词的时候，可以把主语和be动词一起省略。故A正确。