还记得发生在你身上最难忘的一次经历吗?请以“An unforgettable experience”为题写一篇短文，描述

Everyone has some unforgettable experiences. I had a very unforgettable experience when I was 11 years old. I had some training with my classmates. We went to Fengxian and we needed to live in a small dormitory for two days. We did everything ourselves. Our parents couldn’t help us, because they didn’t stay with us. We got up very early in the morning. We had to clean ourselves quickly. And then we stood in a line. We leant a lot of things there, such as cooking, washing and even making beds. Every day, we had to practice more than five hours. Now I think it was very hard for everyone but it was very good for us. Because we are looked after by our parents, but in fact should learn how to look after ourselves. What an unforgettable experience it is!