On a cold evening with snow floating in the air, I got ____ (stick) on the road because of a flat tire(轮胎). I attempted ____ (seek) help from the passing cars, but no one stopped. As I was about to give up hope, a man ____ (drive) an old dirty car came to my aid. To be honest, I was scared when he first approached me. Eying him up and down, I thought to myself, “There is a very good chance ____ he may rob me,” He seemed to have sensed my discomfort so he tried to ease my ____ (anxious) by introducing himself. His act of kindness made me feel ashamed to have questioned his intentions. ____ was really considerate of him to stop to help a perfect stranger like me, especially in such terrible weather. Thus, after the spare tire was fitted, I asked ____ much I owed him. I wanted to pay him back. ____ (surprising), he did not take my offer but rather told me to pass the act of kindness forward and help more people ____ need. As he said those words, I noticed him wearing a smile of contentment. Helping  others seemed a very ____（nature）thing to him. I witnessed the true beauty of human nature in him.