No matter how frequently  （）     the works of Beethoven always attract a large number of people.

题目解析 题目: No matter how frequently （） the works of Beethoven always attract a large number of people. 选项：A. performing B. performed C. to be performed D. being performed 答案: B 解析: "No matter how frequently"表明这是一个固定搭配，后面需要接动词的过去分词形式作宾语。正确答案是B，"performed"作为过去分词形式，符合句子语法结构。