Stay awake! You should know that it ________ to sleep in class.

Great changes ______in his hometown in the last twenty years.

Please don’t make so much noise.I     a novel.

It was not until then that I came to know that knowledge _______ only from practice.?

The couple decided to adopt the child whose parents ________in an accident.

Excuse me, Mary, a reporter from Vanity Fair _______ all day. Could you speak to her now?.

The novels written by Mo Yan sell best now, but years ago no one could have imagined he _____ the Nobel Prize for Literature.

— I'm leaving tomorrow.
— Oh, what a pity! I won't be able to see you off. I ____ a tele-conference the whole morning.

How the fire in the dancing hall started _________ a mystery.

— Can we see your manager now?
— I’m afraid not. He ______ a meeting for nearly two hours and I’ve no idea when it will be over.