Tom was walking along the riverside when he heard someone calling him from behind. He turned around_______ found nothing.
Who are you talking _________?
Mr. Black often _______ to the cinema on Saturday evenings .
—What’s Jim doing now ? —He ________ TV with his father in the living room.
—Hi! Ann, I have good news for you . —______? What is it ?
—What’s Betty doing in her room ? —She’s putting _______ her clothes .