____ was your last vacation? Exciting.
I didn’t have _____ to say, so I said _____.
—Have you _____ had dumplings? —No, not _____.
The shoes were worn out, what’s more, they aren’t worth _____.
— What's the population ____ the U.S.A?— The U.S.A has ____ population of 297 million.
We should plant more trees on ____ sides of the street.