3 1 Complete the sentences with must, mustn't or don't have to. A Dad, I don't want to go to the park with you. B No problem, Mike. You be there. 2 A I'm so thirsty. B Stop! You drink that! 3 A I'm sorry I can't join you. B That's fine. You come. 4 A Sorry, I can't stay. I'm in a hurry. B Oh, no problem. You wait for me. 5 A I don't like swimming. B We go swimming. We can go to the park. 6 A I've got a bad toothache. B You go to the dentist.