You __________ wear a helmet when skateboarding., can't, must, You __________ dive without special equipment., can't, should, You __________ stay hydrated during sports activities., should, mustn't, You __________ use your phone while mountain biking., mustn't, have to, In skydiving, you __________ wear a parachute., should, have to, You __________ practice parkour in dangerous places., shouldn't, have to, In scuba diving, you __________ use flippers and goggles., don't have to, can, You __________ respect the other players., have to, can't, You __________ snowboard without the proper gear., don't have to, shouldn't, Rollerbladers __________ wear knee pads and elbow pads., should, can't, Slackliners __________ check their equipment before practicing., shouldn't, must, You __________ skateboard in the middle of traffic., mustn't, must, Skydivers __________ jump without training., can't, should, You __________ wear goggles for scuba diving., should, can't, Athletes __________ take unnecessary risks., shouldn't, should

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