He (had been) a newspaper reporter before he (became) a businessman.
I (felt) _____ a little better after I (had taken) _____ the medicine.
I was late. The teacher had already given a quiz when I (got) _____ to class.
The anthropologist (left) the village when she (had collected) enough data.
It was raining hard, but by the time class (was) over, the rain (had stopped)
Millions of years ago, dinosaurs (roamed) _____ the earth, but they (had become) _____ extinct by the time humankind first (appeared) _____.
I had never seen any of Picasso's paintings before I visited the art museum.
I almost missed my plane. All of the other passengers (had already boarde) _____ by the time I (got) _____ there.
Yesterday at a restaurant, I (saw) _____ Pam Donnelly, an old friend of mine. I (had not seen) _____ her in years. At first, I (did not recognize) _____ her because she (had lost) _____ at least fifty pounds.
We were driving along the road when we (saw) _____ a car which (had broken)_____ down, so we (stopped) _____ to see if we could help.