1) You mustn't swim here. a) b) c) d) 2) You mustn't use your phone. a) b) c) d) 3) You must do your homework . a) b) c) d) 4) You must come to school on time. a) b) c) 5) You mustn't eat or drink in the classroom. a) b) c) d) 6) You mustn't run at school. a) b) c) d) 7) You must listen to the teacher. a) b) c) d)

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