—Why didn’t Susan come to school? —I don’t know. She____ ill.
Why do we have to ____ Joan’s selfish behavior? She should learn to care for others.
____ the fog, we should have reached our school in time.
There was a long queue for coffee. Having waited for 10 minutes, we ____ gave up.
So difficult did I find ___ to work out the problem that I decided to ask my partner for help.
John went to the hospital alone. If he me about it, I would have gone with him.