1. Hello，Dave. 2. Good afternoon，everyone. 3. Excuse me. Are you Professor Johnson？ 4. I'm Karl Smith. This is Mr. Dai. 5. May I have your name，please？ 6. How do you do？ 7. Nice to meet you！ 8. Let me introduce Linda to you！ 9. What do you do？ 10. How are you this evening？ 11. I'm fine. Thank you. How are you doing？ 12. Hi，Jenny. What's up？ 13. Are you from the U.S.？ 14. Are you going to Toronto，too？ 15. How was your flight？ 16. Good morning，Mr. Johnson. Did you sleep well？ 17. Nice talking to you. 18. Have a good day！ 19. Keep in touch. 20. See you around.
