Complete the sentences with have to, must, don't have to or mustn't. Strange Laws and Rules 1 In a state in the USA, you _______ make ugly faces at a dog, or you can be arrested for doing so. 2 In Switzerland, you _______ wash clothes from Monday to Saturday only. 3 In Norway, a fee is charged on all plastic bottles. You _______________ return the bottle, and if you don’t want to, you will lose money. 4 In France, between 8 am and 8 pm, 70% of the music _______ be French.