--- I haven’t seen Mary recently. And you?--- Me neither. I’m afraid she _________ to her experiment for too long a time.
I arrived at the airport so late that I _____ missed the plane.
She refused to _____ the door key to the landlady until she got back her deposit.
_____ I sympathize, I can’t really do very much to help them out of the difficulties.
For some time now, world leaders _____ out the necessity for agreement on arms reduction.
Have you ever been in a situation _____ you know the other person is right yet you cannot agree with him?