Question

Please play ________ for us.

1. A.
   some musics
2. B.
   a piece of music
3. C.
   some piece of music
4. D.
   a music

Answer 1

B
music是不可数名词，“一段音乐”要表示为a piece of music，“一些音乐”要用some music或some pieces of music，因此选B。