亲爱的王老师：
On behalf of the Student Union of the English Department, I'm writing to invite you to give us a speech on Chinese History.
我代表学生会和英语角写信给你邀请你给我们做一个关于中国历史的演讲。
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
我们打算在401会议室星期二下午2:30开这个演讲。如果你能来参加我们的活动将是我们莫大的荣幸
Please inform us whether you could come. We're looking forward to favorable answer.
请告知我们你是否会来。我们期待肯定的答复
Sincerely yours,
Jimmy
吉米