28. Mary: Aren’t you going on the tour this afternoon? John: I’m tired of tours. I’d rather walk around the city and see what I want to see. Mary: _____ John: If I do, I’m sure you’ll tell me about it. (A) Do you want me to take some pictures for you? (B) We really hope you can join us. (C) Are you sure you want to walk around the city alone? (D) Suit yourself. But you might miss something important.