F: Thanks a lot for coming again. ,M: Tell me what happened this time? Is it the keyboard again or the mouse? ,F: Well, the keyboard is ok now, and the mouse is working well, too, even though you suggested that I get a new one last time. Actually the problem is when I was working this morning, the screen suddenly went black. ,M: Ok, let me have a look. The screen seems to be working, so I'll take a look at the inside of the laptop. Did you save your files? ,F: No, since I didn't know that the computer would stop working. Please don't tell me I've lost my report. ,M: I'm afraid so, here's the problem. Something has overheated inside the laptop. ,F: Can you fix it quickly?
(A) M: Sure, I will try to fix your mouse and keyboard as soon as I can. (B) M: I don't know. I will try to fix your computer as soon as I can. (C) M: But honey, I don't think there is anything wrong with our screen. (D) M: I am afraid I did not quite catch what you were saying. Please repeat it.
B