你叫李平，是英語系學生會主席。寫一封信給王教授，請他做一個有關中國歷史的報告。注意信中要包括目的、時間、日期和地點。

　�、�. Writing

　　May 19，2002

　　Dear Professor Wang：

　　On behalf of the Student Union of the English Department， I am writing to invite you to give a lecture on Chinese history.

　　We have planned to have such a lecture at 2：30 p. m. in Lecture Hall 419， on May 25.

　　Looking forward to your lecture. Inform us in advance if you can not come.

　　Sincerely yours，

　　Li Ping