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You ................ be late for class.
mustn't
You ................ do your homework.
must
You ....................... use your mobile phone in class.
mustn't
You ................... keep quiet in a museum.
must
I ........... use my camera here. The sign says NO PHOTOS.
mustn't
You ............... wash your hands before meals.
must
You ...................... brush your teeth every day.
must
You ............. wear warm clothes when it's cold.
must
You ................. eat or drink in the classroom.
mustn't
