1) You ________ be late for your classes.  a) must b) mustn't 2) You ___________ shout in the classroom.  a) must b) mustn't 3) You ____________ be kind to your classmates.  a) must b) mustn't 4) You _______________ always do your homework.  a) must b) mustn't 5) You ________ raise your hand to participate. a) must b) mustn't 6) You _________wear a mask in public places. a) must b) mustn't 7) You ___________ wash your hands before your meals.  a) must b) mustn't 8) You ___________ brush your teeth after your meals.  a) must b) mustn't 9) You __________ swim when you have a cold. a) must b) mustn't 10) You __________ stay in bed when you have a temperature. a) must b) mustn't 11) You ___________ eat candy when you have a stomach ache a) must b) mustn't 12) You ___________ rest when you have a headache. a) must b) mustn't 13) You ___________ eat sweets before lunch. a) must b) mustn't 14) You ___________ go out in the rain when you have a cold. a) must b) mustn't 15) You ___________ eat in the class. a) must b) mustn't 16) You ___________ use your cellphone in the classroom. a) must b) mustn't

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