Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete the following exchange.
Question 19. Sarah: Would you mind changing your seat with me?
                     Peter:
A. Yes, that's in my mind.
B. No, thanks. I can sit here.
C. I'm afraid not.
D. Okay. But we need to inform the attendant.
Question 20. Mary: Can you tell me the way to get to the nearest station?
                  George:
A. That's right.
B. Here is the map.
C. You are welcome.
D. Never mind