1. Kids should / have to wear a life vest. That’s bur regulation.
2. You mustn’t / don’t have to smoke in here; smoking isn’t allowed in the airport.
3. You must / should hand in your homework on Tuesday, or your mark will be zero.
4. You have to / don’t have to dress up for the party. Wear whatever you feel comfortable in.
5. You should / have to ask the teacher to help you if you don’t understand the lesson.

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I. Complete the sentences with should or shouldn’t.
1. When traveling on public transport, you ____should ____ avoid loud phone conversations.
2. When visiting Thailand, you __shouldn’t________ mention the King and do anything that’s disrespectful.
3. You __should ______ take your shoes off when entering homes or temples.
4. You ____should ___ use both hands when giving and receiving things.
5. When dining in Thailand, you___shouldn’t_____ eat with your fork but do use it to push food onto your spoon.