Listen and read:
Must and must not
Our roads are dangerous places.
There are many accidents on our roads
We must have discipline.
Road signs help us.
Some road signs warn us.
This sign warns us.
There is an intersection ahead.
What must we do?
We must slow down.
We must not go fast.
This sign says "Stop!"
We must stop.
We must not go straight ahead.
This sign says 'No right turn'
We must not turn right.
We must go straight ahead or turn left.
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