Mr. Jones, _____ life was once very hard, is now very successful in his business.

Most Chinese like tea, but some prefer coffee _____tea.

（ ） he often forgot their wedding anniversary greatly annoyed his wife.

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

When we arrived at the airport, we were told our flight （ ）.

He is the sort of businessman who would do anything in his （ ） of profit.

No sooner had he sat down to lunch （ ） there was a knock at the door.

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

We mention the importance of giving up smoking once and again, but hardly ______ it.

I won’t call you, （ ） something unexpected happens.

You （ ） read the article if you don’t want to.

Only those who have tasted bitterness will （ ） among others.