---Alice, you look puzzled, Have you understood it?---No.I _____another problem just now.
—She may not be free today.—___, we’ll have to put the meeting off.
—Is your mother going to the supermarket ?—No, ____.
—Did you visit the museum last week ?—No, we ___, but we spent too much time shopping.
Who can you turn to in time of danger, if not ___?
I’m looking forward as much to her return as she herself to ___ me.