0 You must / mustn’t make a noise – you might scare the animals!
1 You should / shouldn’t always take a mobile phone with you when you walk in the countryside.
2 You must / mustn’t take everything with you when you leave the park.
3 You should /shouldn’t play your music so loudly!
4 You must / mustn’t feed the animals – they can be dangerous.
5 You should / shouldn’t take an umbrella. It might rain.