Look, the old man who is playing ______ guitar is _______ university teacher.

We are entering the school. _______ your cigarette now.

The research they had been devoted to ______ to be of great value to the cancer patients

G. E.M. is ______ a famous singer______ many teenagers like listening to her songs.

tective, _____ to be reading a newspaper,glanced at the man ______ next to a woman.