书面表达。

     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。假如你是刘波，用英语向校长写

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,

      I'm very glad to write a letter to you. 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. Thanks for reading my letter!

                                                                                                                               Yours sincerely,

                                                                                                                                 Liu Bo

It was some time _______ I realized the fact that I had been cheated by the salesman.

A．until

B．before

C．unless

D．since