Complete the sentences with mustn't or don't have to. с mustn't 1 a Look at the pictures. Complete the conversations with the correct form of have to. 1 The museum is free. You don't have to pay. 2 You have to wear smart clothes. You 2 13 wear jeans. 3 The speed limit is 120 km/h. You drive faster. TAXIO 4 Your hours will be 9-5 Monday to Friday. You weekends. work at 3 5 That river is dangerous. You swim in it. Au pair Agency b 6 It's a very small flat. Your I clean it every day