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,
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