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【简答题】
Professor Wang, your senior middle school English teacher, has been teaching for exactly thirty years. Your former classmates are going to hold a party to celebrate this special occasion. You cannot attend the party for a certain reason. So you are going to write a letter to Professor Wang to express your congratulations as well as your apology for failing to show up in the party. Write your letter in no less than 100 words and write it neatly. Do not sign your own name at the end of the letter; use' Li Ming' instead. Do not write the address.
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