Students __________ listen carefully to the tour guide during the museum walk, or we will get lost., must / have to, You __________ bring a raincoat; the weather forecast says there is a small chance of showers, so it's a good idea., should, We __________ leave the campsite messy when we check out. The park rules say we have to leave it exactly how we found it., must not / mustn't, You __________ bring any extra snacks if you don't want to. The school is providing breakfast, lunch, and dinner., don't have to, Everyone __________ wear closed-toe shoes for the hike. Flip-flops are strictly banned on the trails for safety reasons., must / have to, You __________ take photos of the ancient paintings. The sign says flash photography can damage them, must not / mustn't, I think you __________ try to get some sleep now. We have a very long day of walking ahead of us tomorrow., should, We __________ pack up our tents before it starts raining. If we don't hurry, everything will get soaked!, must / have to, You __________ buy a souvenir from the gift shop, but they have some really cool keychains if you're interested., don't have to, All students __________ check in with their assigned teacher at 9:00 PM every night. It is a mandatory headcount., have to / must

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