Since I started to create a civilized city, I have often seen this advertisement about civilization on TV: an abandoned can was thrown on the tram, and people thought it was not thrown by themselves, so they ignored it and even kicked it away. At this time, a line appeared on the screen: Are you still watching at this time? Suddenly, a young man picked up the cans and threw them into the trash can. Finally, a sentence appeared on the screen: the public morality contest officially started today. Yes, if each of us is like that young man with a sense of public morality, how clean and civilized society will become! But now, someone is trying to destroy this beautiful environment: one day last semester, our class was leading a team to do inter-class exercises, and I found a physical education teacher spitting on the ground and stepping on it with his foot; Another day of recess exercise, another teacher vomited one mouthful phlegm on the beautiful playground of our campus ... not only on campus, but also in society. Walking in the street, I often see uncles and aunts I know and don't know spitting sticky phlegm in the street, and I don't feel guilty. So, I have to pay attention to what's under my feet. I think, when people are enjoying, why don't they think of maintaining, but destroying? Hard to be so unconscious? That is even more wrong. When you meet disabled people in the street, and the workers in the supermarket have difficulty in releasing goods, do you choose to help them or pretend not to see them? When you encounter others spitting, when you encounter bad behavior, do you choose to stop or escape? I think most people will choose the latter. Of course, if you really want to contribute to society, you should mobilize your family, friends and relatives, including your neighbors and everyone around you, to contribute to society together: don't litter, help people in trouble, take the initiative to clean the community, and don't cause trouble to others ... Students, let's start from ourselves and create our beautiful home.