1) you needn’t / must worry. It’s ok to drink this water a) needn’t b) must 2) you don’t have to / shouldn’t swim here. It’s dangerous! a) shouldn’t b) don’t have ti 3) you should / mustn’t walk here. No running! a) should   b) mustn’t 4) you have to / mustn’t touch this sign. It has sharp edges a) have to b) Musn’t 5) you must / needn’t turn off your phone here! People are studying a) needn’t b) must 6) you shouldn’t / have to put your food in this bin. It’s only for paper a) shouldn’t b) have to

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