[填空题]Music can be divided into several categories, or groups. Some of them are. classical music, traditional music, rock music, and jazz music. The first group is classical music, which refers to (1) music that originated in Europe a few (2) years ago. Beethoven and Bach were two famous (3) of classical music. Classical music is usually played by a variety of (4) instruments, such as the violin and the cello, and by a variety of (5) instruments such as the flute and the saxophone. The second type is traditional music. Traditional music comes from a particular (6) . For example, "blues" music is one kind of (7) in the United States and "enka" music is one kind of traditional music in (8) Each culture has its own special instruments for (9) its traditional music. In some places, traditional music is also referred to as " (10) music". The third kind is rock music. Rock is generally a <