The Vice Chairman of the conference is （ ） inviting the VIPs.

Only when （ ） in the afternoon （ ） able to leave.

I can’t attend Mary’s birthday party next Sunday evening. （ ）, I thanked her for her kindly invitation.

The quality of education in this small school is better than _____ in some larger schools.

It’s vital that enough money_____collected to get the project started.

I stayed up all night _____ to find a new solution to the problem.

When he awoke, he found himself _____ after by an old woman.

（ ） five hundred people are believed to have drowned.

Our company’s service is （ ） in nearly 80 countries around the world.

By the end of this term, we （ ） 3000 English words in all.

Scientists say it may be five or six years （ ） this medicine is tested on human beings.

In the experiment we kept a watchful eye （ ） the developments and recorded every detail.