明朝开国皇帝朱元璋下诏：“宜令郡县皆立学，礼延师儒教授生徒，以讲论圣道，使人日渐月化，以复先王之旧，以革污染之习，此最急务，当速行之。”“复先王之旧”实质上是指（    ）

—Yes, he bought        for the family.

甲数是a，比乙数的3倍少b，表示乙数的式子是____ .

Mr. Smith didn't go to the movie. He went swimming, ________.

为了使同学们更加健康快乐地成长，学校决定向同学们征求建议。假如你是王宏，用英语给校长写一篇80个词左右的建议信。注意：文中应包含所有要点，并适当发挥；不能出现真实的校名和姓名。开头和结尾已给出，不计入总词数。

Dear Headmaster,
These days we are talking about how to have a better school life. Here are some of my suggestions. First, I hope our school will . Hope my suggestions will be helpful.
Yours sincerely,
Wang Hong