Your watch looks so nice. It must be expensive.—No. I ____ 20 yuan on it.

Tom likes playing _____volleyball, and his sister likes playing______ piano.

Whom would you like to choose as your assistant, Jack or David—If I have to choose, David would be ____________________ choice.

At no time ________ the rules of the game. It was unfair to punish them.

The books are easily ___________ to the readers as all the shelves are open.