During the 1950s and 1960s, there was a healthy social environment. If you offered your 1 to the old or children, everyone would 2 you. At that time, being selfless(无私的), honest and serving people were good, and all people learned from the hero—Lei Feng. Nowadays, 3most people still offer their seats to others, we can also find the fact that some young people have 4 to avoid offering their seats. Some drivers often call out, " Who can offer the old your seat?" It usually doesn't work. As teenagers, what can we do? Every time an old man5 next to me, I'll stand up to offer my seat. After that I feel 6 . Perhaps someone will say you alone can't change the society 7 . That's right. But I do think a little thing can change the world some day. I often talk about my idea with my classmates, and they all 8 with me. They think that a good environment can be formed with everyone's effort（努力）. Everyone dreams of changing the world, so let's 9 from simple acts like 10 up waste, saving water, using both sides of paper…NO mater how small the act is, we can do it every day to help change the world for better .
