Sally is a good girl. She often hello to her teachers when they meet.

Time is money. —But I think time is money.When money is spent, we can make more; but when time is gone, it never returns.

The environment here becomes better and better. ______ birds are coming back.

Nobody knew who was the first ________ at school thatmorning when the window was broken.

Why are you looking in class all day—Because I can’t finish my homework until eleven every night.