Choose the suitable modals to complete the sentences.

Choose the correct option.

You [mustn't|don't have to] be late to class. If you are late, you have to wait for the next class.

We [mustn't|don't have to] dress fashionably. You can only do it if you want.

Joe [mustn't|don't have to] be rude to his sister; his parents are really strict about it.