It is believed that part of animals can’t stay alive in water at 1,500 meters below ____ sea level.
We are short of money, so every coin ______ now.
Father ____ his number in the phone book to make sure that he had got it right.
— More than thirty students competed ______ each other in the English competition. — But they could only compete ______ three medals.
--It’s reported that scientists have ________ an effective way to deal with H1N1.--Really? That’s great!
---- Did you have ________ fun at the party? ---- Yes. It’s ________ shame that you missed it.