1) Raise your hand a) can b) must c) mustn't 2) Listen to the teacher a) can b) must c) mustn't 3) Eat chewing-gum a) can b) must c) mustn't 4) Write on your desk a) can b) must c) mustn't 5) Chat a) can b) must c) mustn't 6) Put your chewing-gum in the bin a) can b) must c) mustn't 7) Be quiet a) can b) must c) mustn't 8) Ask questions a) can b) must c) mustn't 9) Do your homework a) can b) must c) mustn't 10) Be late a) can b) must c) mustn't 11) Listen to music in class a) can b) must c) mustn't 12) Run in the corridors a) can b) must c) mustn't 13) Use your phone in class a) can b) must c) mustn't 14) Help your teacher a) can b) must c) mustn't

Obligation, interdiction, permission: must, mustn't, can't

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