1.Now let environmental roots,shows a green future .
2.Guarding a river clean water,the fish return to their homes home.
3."Barbecue" No carrying inflammable goods on board!
4.Ning third stop,the undisputed second.
5.Traffic laws are the protective shield of your life.
6.Our life is like a blank sheet of paper ...Do not spit indiscriminately chewing gum,fruit,such as junk.