(1)My little brother enjoys nothing but _listening_ to music.
因为enjoy doing
(2)My little brother does nothing all day but __listen__ to music.
因为有do无to
(3)My little brother had no choice but ___to listen__ to me.
因为无do有to
(1)My little brother enjoys nothing but _listening_ to music.
因为enjoy doing
(2)My little brother does nothing all day but __listen__ to music.
因为有do无to
(3)My little brother had no choice but ___to listen__ to me.
因为无do有to