1) Students ... be late for school. a) must b) must not 2) Students ... cheat in tests. a) must b) must not 3) Students ... polite to each other. a) must be b) must 4) Students ... talk quietly on the school bus. a) must b) must not 5) Students ... drop litter. a) must b) must not 6) Students ... finish the exercises on time. a) must b) must not 7) Students ... bully their classmates. a) must b) must not 8) Students ... shout in the classroom. a) must b) must not 9) Students ... take an exam at the end of the year. a) must b) must not 10) Students ... use smartphones during the lessons. a) must b) must not

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