One possible version:
Three years ago, just before my departure with my good friend Tommy, he got me a wonderful watch as my birthday gift, which I had ever since been treasuring all the time before unfortunately I got it lost.
I used to go everywhere with company of my watch pet but the other day I could go nowhere for its sign. I was so upset and depressed that I lost any desire for doing things and I could not even recall where and how I lost it. What happened next on this morning, however, almost sent my spirits flying higher than sky. Guess what? It found its way back to my dormitory, lying on my bed with a note beside it saying: I’m sure it’s yours, so I brought it back from the library assistant. Jack.
Ah, my dorm mate Jack found it in the library. Can you imagine how excited I was at that moment? I must offer my thankfulness to Jack for his kindness. And I also need to reflect on my carelessness.
考查提纲类作文的写作。提纲类作文的关键在于表达方式的选择和要点的完备，不能有遗漏或者省略。话题是物品不慎丢失而又找回的经历，要点是以提纲的形式表示的，要适当增加细节，不能只是把要点翻译成英语、，注意改变文章的样式。难度在于选择合适的词汇和句型表达文章需要的意思，可以变换使用一些容易驾驭的句子或者词汇实现同样的目的。he got me a wonderful watch as my birthday gift, which I had ever since been treasuring all the time before unfortunately I got it lost.这句话用了非限制性定语从句What happened next on this morning, however, almost sent my spirits flying higher than sky. Guess what?这句话是what引导的主语从句，还要使用合适的连接词来连接各要点，使文章成为一个整体。