(   )28.－_____ you put away your books?－Yes, mum. I’ll do it at once.

You       play computer games for a long time. It’s bad for your eyes.

For the safety, everyone _________ obey the traffic rules when he is driving or walking.

— _    good time we had at the party last night!— Yes. It was _____ exciting party that I would never forget it.

It was so dark outside that the little child ________ go out by himself.