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
网友回答
(答案→)A. performed
B. performing
C. to be performed
D. being performed
解析：考查状语从句的省略。句意：“无论贝多芬的作品多么频繁地被演奏，它们仍然吸引全世界的人们。”状语从句省略了they are.所以贝多芬的作品是被演奏，应该选过去分词。当状语从句的主语和主句的主语一致并含有系动词be时，可以省略主语和系动词be.选A。