It was some time _______ we realized the truth.
I _______ in London for many years, but I’ve never regretted my final decision to move back to China.
I was giving a talk to a large group of people, the same talk I _______ to half a dozen other groups.
“You’ve left the light on.” “Oh, so I have. _____ and turn it off.”
He has changed a lot. He _______ not what he _______.
“I suppose you _________ that report yet?” “I finished it yesterday, as a matter of fact.”