F: I've been working on the problem for a long time, but I still can't work it out. ,M: Take it easy. You might as well do something else now. Maybe you can find some clues later.
(A) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (B) F: Wow! You're awesome! You work it out in such a short time, it is so easy for you. (C) F: You and Tom can stop working and buy something to drink. (D) F: Ok, I will take a walk in the park at this moment.
D