We are so tired. Let’s stop _____ a rest.

Computer is so useful. It can do almost everything.—Yes, but it ______ what to do.

You’d better______smoking. It’s bad foryour health.

I knocked at the door hard,and soon the door opened and a _____ face looked out, “ who is troubling me at this time of night.”

It’s known that Suzhou is __________ in the world.