親愛的王老師：

　　On behalf of the Student Union of the English Department, I m writing to invite you to give us a speech on Chinese History.

　　我代表學生會和英語角寫信給你邀請你給我們做一個關于中國歷史的演講。

　　We re going to have such a speech at 2:30 p.m. this Tuesday afternoon in the Meeting Room 401. It would be great honor if you can join in our activity

　　我們打算在401會議室星期二下午2:30開這個演講。如果你能來參加我們的活動將是我們莫大的榮幸

　　Please inform us whether you could come. We re looking forward to favorable answer.

　　請告知我們你是否會來。我們期待肯定的答復

　　Sincerely yours,

　　Jimmy

　　吉米