假设你是李华，于2013年3月5日搭乘国外某航空公司航班（flight number BC779）回国后，发现遗失了一个行李箱（suitcase）。现请用英文给该航空公司写一封信，请他们帮你寻找。
信件要点包括：
1. 陈述写信原因。
2. 简要描述该行李，并说明其重要性。
3. 期待回复并表示感谢。
注意：1.词数100左右。2. 信件格式已给出。
Dear Sir/Madam,
Yours truly,
Li Hua
Possible version:
I left my suitcase in flight number BC779 on 5th, March, so I am writing this letter to ask you for help. The lost suitcase is a red one with a long handle. It is of great importance to me. In it are some valuable books and my credit cards. I will be very grateful if anyone of you contact me by telephone immediately after seeing it. My telephone number is ………
I would appreciate it if you could give me an early reply.
Yours truly,
Li Hua
网友回答
(答案→)
Possible version:
I left my suitcase in flight number BC779 on 5th, March, so I am writing this letter to ask you for help. The lost suitcase is a red one with a long handle. It is of great importance to me. In it are some valuable books and my credit cards. I will be very grateful if anyone of you contact me by telephone immediately after seeing it. My telephone number is ………
I would appreciate it if you could give me an early reply.
Yours truly,
Li Hua
解析：提纲作文要求考生根据所给的写作要求和提纲，确定文章的中心思想，然后紧紧围绕中心思想展开写作。要求考生在保证内容要点全部概括的基础上可以充分发挥自己的想象，进而用自己的语言来表达某种观点或看法，增添了写作的灵活性，同时能较好地考查考生的想象能力和英语语言表达能力。