The teacher told Jack _______ off the light when he left the classroom.
turn
turning
to turn
–Look at that girl! Is it Susan? --No, it _______ be her. She has gone back to her hometown.
–Would you mind my using your dictionary? --__________.
–Thanks for your help. --_________.
–Where are you going for your holiday? --Well, we _______ yet.
--When _______ you _______ to learn to skate? --Five years ago.