【正确答案】
   
   
Dear Sir/Madam,
   I arrived in Beijing from Shenzhen this morning by express train No. 108. At the Shenzhen station, I registered a trunk, but when I went to your luggage office to draw it this afternoon, I was told that it was missing. The check I hold is No. 100859. I sincerely hope that you will trace the missing article at once, for there are many important things in it. My trunk bears my personal name Jim Green. I am now staying in Room 227, Beijing Hotel. If you have retrieved it, please inform me soon or contact me by calling 85305101.
   Thanks!
   

【答案解析】 本文要求写作一封求助信，前提要求是对事实情况进行说明。写这种信时，应注意以下几点：
   1．格式上应采用正式格式，即信头、信内地址、称呼、正文、结束语和签名等。
   2．称呼栏中不宜使用具体人的姓名，而要采用诸如Dear Sir/Madam等的表达方式。
   3．在对事实情况进行说明时要提供相关的事实依据，同时注意措辞严谨。