There is a small shop around our school and the boss is a very nice person. Many students like to buy snacks in his shop. Last week, I went to this shop and bought some snacks to eat after school. I found my money was not enough. The boss realized my problem and he asked me to pay back next time. Watching his smile, I felt so shocked by his kindness. Even if I did not return the money, he couldn't remember me. But I must keep my promise. When I got home, I wrote down the money and reminded myself. Next day, I returned the money and felt relieved. I passed the test of my life.