You (mustn't/ don't have to) work on Sundays. It's your free day.
don't have to
Children (mustn't/ don't have to) play with fire in the house. They can burn the house down.
mustn't
People (mustn't/ don't have to) use their mobile phones in classrooms. There is a lesson going on.
mustn't
At a restaurant you _________ pay the bill but you __________ eat everything.
have to/ don't have to
You (mustn't/ don't have to) cross the roads without looking. It’s dangerous.
mustn't
Students (mustn't/ don't have to) stay in the classroom in the break if they don't want to. They can go outside.
don't have to
Mike ( mustn't /doesn't have to) stay up all night. He can finish the work tomorrow.
doesn't have to
I _______________ buy a chicken for dinner.
must
You(mustn't/ don't have to) buy the text book for this course - you can borrow mine.
don't have to
You (mustn't/ don't have to) cross the road when the red light is showing.
mustn't
Soldiers(have to/ must) obey orders.
have to
I think I(must/have to) work harder before the exam.
must