1 19 Listen to five short dialogues. For each one, choose the people you think are talking to each other. 1a a teacher and a pupil b a parent and a child 2 a a customer and a shop assistant b a parent and a teacher 3 a two pupils from the same school b two pupils from different schools 4 a a teacher and a pupil b a parent and a child 5 a a parent and a teacher b two parents​