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Fire can burn down...
a lot of trees
a bus
......
We must be careful with fire !
Fire is dangerous!
Don’t smoke.
Don't smoke.
=
We ___________________.
mustn’t smoke
Don't smoke in the park.
We mustn't smoke in the park.
We mustn't smoke in the market.
Don't smoke in the market.
Don't smoke in the hospital.
We mustn't smoke in the hospital.
Don't smoke in the bus.
We mustn't smoke in the bus.
Don't play with matches.
=
We ___________________________.
mustn’t play with matches
We mustn't play with matches at home.
Don't play with matches at home.
We mustn't play with matches ...
Don't play with matches...
Don't play near fires.
=
We _______________________.