---I don’t like the pants. They’re too long.---What about this ________?A. one B. ones C. pair
—Listen! Someone is playing ______ piano. —Wow! ______beautiful music! I like it very much
Our teachers always give us good advice. We should follow _________.
More money ____________ when we use both sides of paper.
---Where were you this morning? ---I _____________ in the supermarket.
Some animals can even see things ____________ in the dark.