As a doctor, you can’t be ________ careful.
I am very thirsty. Could you please give me ______ water?
—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.