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for the first time
behave politely in public
push in before others
do as the Romans do
do as the local people do
Lead-in
No smoking
No parking
No photos
No littering
These signs all warn us not to do something.
Public signs
Keep quiet
No eating or drinking
Keep off the grass
独立思考，四人交流，全班分享
Do the right things in public places
drop litter everywhere
leave the tap running
keep quiet in the library
obey traffic rules
pick flowers in the park
queue for your turn
Match the pictures with the phrases
Check the preview
Presentation
I.Check our preview work.
Translate the words into English:
1) 公开的，公共的adj. ______
2) 解释v._________