1) You _____ talk in class. a) must b) mustn't 2) You _____ feed the animals. a) must b) mustn't 3) You _____ leave pets at home. a) must b) mustn't 4) You _____ wear a mask. a) must b) mustn't 5) You _____ ride bikes. a) must b) mustn't 6) You _____ play loud music. a) must b) mustn't 7) You _____ put rubbish in the bin. a) must b) mustn't 8) You _____ run during the break. a) must b) mustn't 9) You _____ be quiet. a) must b) mustn't 10) You _____ come in. a) must b) mustn't 11) You _____ eat in the classroom. a) must b) mustn't 12) You _____ wash your hands. a) must b) mustn't 13) You _____ use your phone. a) must b) mustn't 14) You _____ swim here. a) must b) mustn't

must / mustn't

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