3. Make right!
Find the mistake in each sentence and correct it.
You must doing your homework. You must do your homework
b. You must to be careful when cutting food.
c. You mustn't shouting in the museum.
d. He musts wear a school uniform.
We mustn't to pick the flowers at the park.
You no must run at the swimming pool.
g. We must looking both ways when crossing the road
She mustn't took toys to school.
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