Our main concern is to _____ the living standard of the people.

Scientists now have some surprising answers about whether brain power（ ）as we get older.

What （ ） would happen if he told mom and dad what we had done?

It is a fact _____ most deaths from lung cancer are caused by smoking.

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

She is _____ kind a girl that all of us like to make friends with her.

Language belongs to each member of the society, to the cleaner（ ） to the professor.

We are at your service. Don’t （ ） to turn to us if you have any problems.

Humble （ ） it may be, there is no place like home.

They spent all their money and made no （ ） for the future.

It is reported （ ） great changes have been made with the application of the new policy．

Take your time and think the matter over before you _____ a conclusion.