托福口语求助！！：Describesomething you write that is very important

托福口语求助！！：Describesomething you write that is very important to you.
在口语真经看到这道题：Describesomething you write that is very important to you. It could be a letter, apoem, an essay. Explain why you think it is important to you.翻译下来不应该是 描述你自己写过的很重要的东西么?为什么真经给出的答案：I remember clearly that it was the letter written to myparents by my teacher when I first arrived at my university.是他的老师写的，不是自己写的呢？？