3. A: Where's your dictionary? B: I don't know, it's just disappeared.
4. A: Let's go and see 'Lions of Africa' at the Cannon cinema. B: I've already seen it. A: Oh well, have you seen 'Green Beans'? B: No, let's go to that.
5. A: Please can I have my book back. B: Oh dear. I haven't finished it.
6. A: Are Steve and Martha at home. B: No, they have gone out.
7. John looks thinner. Has he lost weight?
8. A: Is Sally enjoying her new job? B: I don't know. I haven't heard from her.
9. A: Why doesn't this tape recorder work? B: I think you've broken it.
10. Mary, you're very late. I was worried about you. Where have you been?
11. A: How many times have you taken your driving test? B: Twice. My third one is next week.
12. This music is new to me. I'm sure I haven't heard it before.