We _____ mess about in class.
We MUSTN'T mess about in class.
We ______ keep the classroom tidy.
We MUST keep the classroom tidy.
We ______ eat during class.
We MUSTN'T eat in class.
We _____ say bad words
We MUSTN'T say bad words.
We _____ stay in our seat.
We MUST stay in our seat.
We _____ bring the book.
We MUST bring the book.
We _____ raise the hand to speak.
We MUST raise the hand to speak.
We ______ listen the teacher.
We MUST listen the teacher.
We _____ shout.
We MUSTN'T shout.
We _____ respect each other.
We MUST respect each other.
We _____ arrive late.
We MUSTN'T arrive late