One possible version:

　　In our daily life, I usually see some bad behavior around us. For example, I often hear people speak and laugh loudly in public. It is too noisy. Some people cut in line while others are waiting. It makes me unhappy. And in our school dining hall, I often see students waste food. At times, people seem unfriendly and offer no help when others are in trouble. For me, my parents are strict with me. They often tell me to behave well. So I never drop litter about. And I never draw on the desk or on the wall. I am polite to old people.

　　I think if everyone can think more of others, we’ll have a better living environment.