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

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

The committee is _____ session; no one can enter the hall.

The hotel was reasonably comfortable but the food lacked （ ） and the service was poor.

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

He （ ） yesterday morning, and would stay for three days.

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

Dentists suggest brushing teeth at least twice a day to _____ them from decaying.

We like our English teacher because she often tells （ ） funny stories in class.

It was Thomas Edison that （ ） the electric lamp.

Mr. Phillips caught up with the boy in the corridor and （ ） his hand on his shoulder.

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