You might not like the way Sam behaves, but please be kind to him.______ , he is your grandfather.

（ ） some mammals came to live in the sea is now known.

If we cannot agree upon our Christmas activities right now, why don’t we （ ） it in next week’s class meeting?

I don’t like to _____ a room with a stranger.

The tribe had been living in that part of the area for generations until the civil war ______.

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

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

Neither his family nor he （ ） anything about it.

The children have been （ ） since their father left．

The Quality Control Staff is responsible _____ the quality of the products that come out of the factory.

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

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