1) You .............. study hard a) must b) mustn't 2) wash your hands everyday a) must b) mustn't 3) we............ sleep in classroom a) must b) must not 4) Play with fire a) must b) mustn't 5) eat a lot of junkfood a) must b) mustn't 6) I ............ speak English in my English class. a) must b) mustn't 7) I ........... be late for school/work a) must b) must not 8) People .............. smoke in public places. a) mustn’t b) must 9) People ................... wear a seatbelt in a car. a) must b) mustn't 10) I ......... do my homework. a) must b) mustn't

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