her took me to school by bike.i sat at the back of the bike,eating a banana.after i ate it up,i threw the skin onto the street randomly.
　　no sooner had i done this than i realized that i had done something bad to our environment.and maybe someone would step on it and tumbleover.i must pick it up.thinking of these,i asked father to stop.i jumped offthe bike and ran back to pick up the banana skin and threw it into a roadside dustbin.seeing this,father praised me and i felt very happy.
　　in future i will protect the surroundi