10 Complete the sentences. Use must, may or can't and the infinitive in the correct form. 1 A: They only moved in a month ago. B: They ..... (know) many people. 2 A: Look. Jane is putting on her jacket. B: She (go) out. 3 A: Are we having lunch soon? B: You ..... (be) hungry already. 4 A: Where's Jane? B: I'm not sure. She ..... (go) out. 5 A: I've been working all day. B: You ..... (be) tired. 6 A: Why are those people in the street? B: I don't know. There ..... (be) an accident. 7 A: I can't find my scarf. B: You ..... (leave) it at home.