One day,a boy and a girl went home together after school.They saw a dustbin on the way home,all the rubish were throwed out.The girl collected the rubish,and threw it into the dustbin.At the same time,the boy came up with a good idea.He took out a pen and a piece of paper from his schoolbag,and wrote "to protect the environment " on the paper.Then they paste the paper on the dustbin.After that,people did not threw the rubish everywhere like before.
原创的作文.