More have been learned since 1945 about chemical changes in the body than in all human history before _____ time.

Could you please _____ why you can’t come to attend the meeting?

Look， here （ ） the famous pop singer.

It is her beautiful eyes （ ） attract most of the fans.

There is nothing new about women （ ） their careers to look after children.

My university lies in the north of the city, around （ ） high mountains.

Don’t get off the bus （ ） it has stopped completely.

（ ） bad news it is! We must try our best to help them out of the difficulty.

The film （ ） him of what he had seen in China.

Before he left for his vacation he went to the bank to _____ some money.

As a Chinese proverb goes， a heavy snow _____ a good harvest year.

No sooner had I locked the door （ ） the telephone rang.