You ............. wear a helmet when riding a bike., should, mustn’t, You ............warm up before you start running., Should, shouldn’t, You .......... stop at a red traffic light., have to, mustn’t, You ............eat too much junk food., shouldn’t, have to, Professional swimmers ...........wear life jackets., mustn’t, Don't have to, You ............ bring your ID to enter the building., must, don’t have to, You .............check the weather before hiking., ought to, mustn’t, Students ........... cheat in exams., have to, mustn't .

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