________ his age, he still leads an active life.

We should keep _______ in the reading-room.

He____to school,so he turned off the alarm clock andwent back to sleep.

How much is the ticket to Central Park— A one-way ticket ______ ＄40, and you can ______ another ＄20 for a round-trip.

－What do we need to buy －________.