Complete the exchanges, using can, can't, must, have to, might, should, needn't and the verb in brackets in the appropriate form. 1 A: Have you talked to Bill? B: Not really. He ..... (be) in the office holding the meeting. 2 A: I have caught a cold. B: You ..... (put on) a warm coat. 3 A: My dog is hungry! B: You ..... (take) some dog food with you. 4 A: It hurts me to swallow. B: You .......... (catch) a cold. 5 A: Would you like to go out with me? B: I'd love to, but I ..... (do) the washing-up. 6 A: I thought I saw Mr Black an hour ago. B: You .......... (see) him. He's been away since morning.