.—___________ is the population of the United States?—I don’t know exactly, but I’m sure that it has __________ population than China.
The building _______ next month is our new library.
He prefers _____books at home rather than ______TV.
John, look at the time._____ you play the piano at such a late hour?
I was just talking to Mary when Jack _____
_______him and then try to copy what he does.