The author of the report is well _____ with the problems in the hospital because he has been working there for many years.
I lost sight of Wang Ping when we reached _______ looked like a large market.
Come and see me whenever _______.
He found themat a tablechess.
happened to be no one in the building when the fire broke out.
—Did you enjoy staying with your friend last week, Lily? —Yes. I _______ with him for a long time.