M: I went climbing last weekend. It's tiring but quite interesting. What about you? ,F: I plan to go to the park for a picnic. But my friend dropped by, so I showed her around the city.
(A) M: I didn’t hear you. Please could you tell me again? (B) M: It's so sweet of you to stay with your friend. (C) M: It's so sweet of you to have a picnic with your friend. (D) M: Why didn't you stay with your friend?
B