（ ） comes back first is supposed to win the prize.

It was not known （ ） he had said during the interview.

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

When I saw the expression on his face, I realized he is （ ） agreement with me.

Most Chinese like tea, but some prefer coffee _____tea.

Many students thought about the third question for quite a while and had great difficulty answering it. Obviously, it was _____ all.

—Professor Wang, must I hand in the paper this week? —No,（ ） . You can hand it in next week.

You needn’t introduce him to me. I’ve met him on several _____.

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

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

It is （ ） impossible to work with this noise around.

You’re （ ） understand the real meaning of love.