gentle behave is very important in the national communicate ,so improve people ethusicate is must open .i offen see one spit on the street and on the trees ,its impolite ,you should spit on the nakaspin someone thow the litter into the river or streets ,its bad ,we dont do it anymore ,its bad for our enviornment .someone go to toliets without close the door ,what a pit ,we dont d oit anymore .we should be a good person to protect our expression in the world