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No fishing
No smoking
No littering
No swimming
No parking
Wet floor
Danger!
Walk carefully
Where can we see them ?
What can we do ?
What can’t we do ?
Let’s talk
What makes our city dirty?
What can we do to keep our city clean?
Brain storm
What do you think of our city?
city
beautiful
clean
dirty
noisy
（嘈杂的）
modern（现代的）
messy
…
Brain storm
… make (s) our city …
There’s … There are …
We use…to…
To keep … , we can… / can’t…