3. Вставьте must или mustn’t Tom: Mum, I don't want to go to school. Mother: But you (1) Tom: The pupils don't love me. Mother: Well, you (2) shout at them. You (3) be polite and friendly. Tom: They (4) use their mobiles but they do. They (5) be late for school but they are. Mother: You (6) be so angry. Try speaking to them. Tom: That won't help. I think I have a running nose ... Mother: Oh, no, come on, Tom. Shame on you! You are OK. You (7) go to school. You're a teacher.