She ______ for ten hours at least. It was at nine that she fell asleep last night.A slept B had slept C has slept D was sleeping
Do you know where ______________?
When I was a child, I used to ___________ chocolate.
Did the police catch the thief___________?
He doesn’t do his homework___________, though he has ___________.
—_________ was light bulb invented ________ ? —Thomas Edison.