If you meet trouble, you can ______ your friends ________ help.
We know that she enjoys ______ books very much.
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.