—I’m very tired these days because of walking to school every day.—________ useful exercise you are taking! It can help you keep healthy.
I didn’t hear your call because I ______ to music at that time.
My parents often______ me some gifts on my birthday.
— Must we get to the airport before 8 o’clock?— No, you _____. The plane takes off at 12 o’clock.
Which is ____________, the telephone, the computer or the light bulb?
There ______ a park near here. Shall we take a walk?