23. - Tom: “Congratulations! You’ve passed the exam.” - John: “_____________”

A. No, I don’t think so                         B. Many thanks 

C. Sorry, I don’t                                 D. Not at all

24. - James: “Why don’t we go out for a picnic?” - Henry: “_____________”

A. Congratulations!                                B. That’s a good idea.

C. Because I’m busy.                                D. You’re very kind to say so