Mrs. Sally ______________ (teach) English for thirty years before she retired.
My grandpa __________ (sleep) for three hours when I woke him up.
A young boy_______________ (stand) at the door until a policeman arrived.
My father ___________ (try) to fix the broken pipe for an hour before we eventually called a plumber.
The baby ____________ (cry) for fifteen minutes before her mother heard her cry.
How long ____________ (Dan drive)before he fell asleep and had an accident?
How long ____________ (you teach) before you were offered this position?
By the time we reached the station, the train ___________ . (leave)
I wish you ______ (send) your application in time.
By the time the fire fighters arrived, the fire ________ (destroy) many huts.