This summer,I went on a tour in Liaoning Province.One day,I was taking the bus on my tour to Dalian with many people,when suddenly I felta bit hungry,so I took a banana out of the bag.After I had abanana,I threw the skin out of thewindow without thinking twice.When the driver saw what I have done,he stopped the bus atonce,opened the door,got fromthe bus and picked up the banana skin.When he returned back