题目内容：
Suppose you are invited to a party at Nancy's home but you can't attend it because you will have an exam on the same day．Write a letter of apology to Nancy．Your letter should include:1) your apology and the reason
2) your suggestion for another get together
You should write approximately 100 words．Do not sign your own name at the end of your letter．Use "Wang Lin" instead．You do not need to write the address．
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