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2. 并两人一组用'What does it mean？
It means...'快速相互问答说出你看到的标志。
Sam and Bobby are on an outing in the forest.
A. Stay at home
B. Go out and play
Keep off the grass
No picking
No climbing
No parking
Danger!
No eating or drinking
No littering
No smoking
No swimming
Wet floor
No running
No shouting
No pets
School crossing
No feeding
No fishing
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