b Circle the correct form. Check (✓) if both are possible. We don't have to/ must not go to school next week. It's a holiday. 1 You don't have to / must not cross the road when the traffic lights are red. p.56 2 What do I have to / must I do when I finish this exercise? 3 The concert is free. You don't have to / can't pay. 4 We're late for the meeting. We have to / must go now. 5 You don't have to / must not leave the door open- the dog will get out. 6 I have to / must pay Jane back the money she lent me 7 In the US, you have to / must drive on the right. 8 You don't have to / can't be tall to be good at soccer for each lesson​