If we continue to destroy and waste the natural resources like this, we will ______it sooner or later.

The books are so nice, which one can I take —Oh, you can take _______ of them. I’ll keep none.

He looks unhappy.—Yes,but he can’t say what it is_______is bothering him.

The little boy always looks cheerful.

This is our new English teacher, and ___________ name is Jane.