【正确答案】
D
【答案解析】[解析] 53-55
M: Doctor, I've got a terrible toothache. It's already lasted for a few days, and it's .getting worse and worse.
W: Just relax. Can you tell me the details?
M: When it first occurred, it was not serious. I could bear the pain. Since yesterday though, the pain has became more serious, even the painkiller couldn't help. It was impossible for me to eat and fall asleep later. I tried cold compress, but it could not work, neither.
W: Well, let me examine you for a minute. Please try to open your mouth, and say "ahh"...