For some time now, world leaders _____ out the necessity for agreement on arms reduction.
---I think you should telephone Jenny and say sorry to her.----______________. It’s her fault.
Trust him please! When he _______ reading it, he will return the book to you on time.
He is my father and I know he will forgive me for _______ I have done.
Charles is believed_______ the floor yesterday; he is always helping others silently.
The _____ of electricity added to our difficulty repairing the bridge.