F: Have you answered all the 6 letters? ,M: I have dealt with all the easy ones, but I haven't started on the 2 hard ones.
(A) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (B) F: Now that you have started on the two hard letters, I will not disturb you. (C) F: It's really challenging for you to answer the four hard letters. (D) F: That's great! You have dealt with all the six letters.
A