It is important that the boy （ ） an adult to take care of him.

It is often _____ that human beings are naturally gifted to speak.

Air pollution is obviously one of the major _____ of city life.

He began to take politics _____ only when he left school.

When I heard that my mother would come to see me this weekend, I （ ） for her to arrive.

Surprisingly， the accident did very little _____ to either of the cars.

After （ ） the numbers in every possible combination, we finally hit on a solution.

When I go out in the daytime I use the bike _____ the car if I can.

Her passionate voice was always influential and （ ）.

I’d rather you （ ） talk about this matter for the time being.

Our visitors decided to stay in our city for _____ two days as they wanted to have a look around.

（ ） all her friends and money gone, Kate felt totally hopeless.