As we all know, ________life is hard for any of us.If we want to live________happy life,we must work harder.
_____ leaves the room last ought to turn off the lights.
--Why didn’t you tell Ann the truth? --______ .
Is this school ______ they visited the other day?
--You’ve made great progress in your studies of English, haven’t you? --Yes, but much ______.
The students are ______ to hand in the exercises before class.