有所为有所不为

Do's Be polite and friendly.Initiate（开始，发起）and engage in conversation. Be involved in all programmes. Make your own bed. Wash your own plates and cups. Maintain cleanliness and personalhygiene（卫生）Put things back after using them. Help around the house. Put up the toilet seat after using. Save water and electricity. Observe table manners. Be observant of culture and customs. Be punctual at all times. Ask when in doubt. Inform buddy of your whereabouts. Be mindful of traffic and personal safety. Don'ts Criticise or mock what you observe. Crack racist jokes. Spoutvulgarities（粗俗语）or actobnoxiously（可憎地）. Bring handphones to school. Bring expensive equipment on the trip. Leave your belongings unattended.