【题目】No matter how frequently__________, the works of Beethoven always attract large audiences.
A. performed B. performing
C. being performed D. to be performed
在线课程【答案】A
【解析】考查过去分词。句意：不管贝多芬的作品被多么频繁地演奏，总能吸引大量的观众。当主句的主语和从句的主语一致时，可以将从句的主语和be动词省略。根据perform与主语the works of Beethoven是被动关系，故此处用过去分词表被动，故选A。