—I see you got a "D" in biology._ ?—Well, I found that subject hard. I think I'II drop it for history.
_______ is the population of China?
He has never visited the Great Hall of the people, _________?
A number of sheep _________ seen by us when we passed the field..
Both Kate and I _________ ready for the picnic now.
A boy with two dogs _______ when the earthquake rocked the city.