在市场上购买衣服时，你看到的表示“中”号的字母代表是(    )      

If you want to be healthy, you’d better eat _____ too often.

—It’ s sunny today, Daddy, How about going swimming with me? —_______. Let’s ask your mommy to go with us.

You are  _______ twenty—two . You should have more test .

Math is a little difficult, but I still like it very much.