Read and underline.then act out. 1.a: you must /mustn't put your hand up to ask a question b: ok, miss. 2.what's the matter, officer? b: you must /mustn't park your car here. 3. a: you must /mustn't do any sports for two weeks. b: ok, thank you, doctor. 4. a: you must /mustn't bye a ticket before you get on the bus. b: really? where do i get one from?