日前你从一位朋友处得知史密斯教授下月将来华访问。史密斯教授专攻美国文学，目前在美国一所知名大学任教

Dear Mr Smith, I have learned that you are paying a visit China next month.I have heard so much about you.I know you specialize in American Literature and now teach in a well-knowned university in American. Would you like to come to our college at your convenience and give a lecture on American Modern Literature to our students？ We would appriciate it very much if you could come . Looking forward to your reply. l Yours, ***