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You must/mustn't
You mustn't use your phone here
Oops!
Okay!
You must/mustn't
You musn't walk on the grass
Oops!
Okay!
You must/mustn't
You must put litter in the garbage can
Oops!
Okay!
You must/mustn't...
You must be quite
Oops!
Okay!
You must/mustn't
You mustn't swim here
Oops!
Okay!
You must/mustn't
You mustn't sleep in the class
Oops!
Okay!
You must/mustn't
You musn't pick the flowers
Oops!
Okay!
You must/mustn't
You mustn't talk loudly here
Oops!
Okay!
You must/mustn't
You must wash your hands
Oops!
Okay!
You must/mustn't
You musn't eat
Oops!
Okay!
You must/mustn't
You mustn't ride your bike
Oops!
Okay!
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