Share must vs mustn't
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We ______ keep quiet in the classroom.
must
We ______ sit still in the lessons.
must
We ______ line up in the corridor.
must
We need to keep the classroom clean. We ______ spit or litter.
mustn’t
We _______ run in the playground.
mustn’t
When we play ball games, we ______ wait for our turn.
must
We ______ climb the trees.
mustn't
We ______ keep off the grass in the garden.
must
