List of irregular verbs - Grammar reference » Стр.153 (2)

2. Rewrite the sentences, using the correct form of must, have to and should. For one sentence two of these verbs are correct. Which sentence is it? 1. We mustn’t text our friends in lessons. 2. You should read through your work before you show it to anyone. 3. He doesn’t have to wear school uniform. 4. Which phone should I buy? 5. We didn’t have to book seats for the concert. 6. You shouldn’t wear your best shirt when you mend your bike. 7. Both drivers and passengers have to wear seat belts.