A、His face is swollen. B、The tooth is sensitive to hot. C、It is painful all the time. D、It is quite a sharp pain. D题目问的是以下哪一项关于男

W: Hello, Mr. Wang. How are you doing?
M: Mm... I’m well, but I have come here for something.
W: Oh, really. Have you been having any problems?
M: (16) I’ve been having a toothache.
W: Can you describe the pain for me?
M: (17) It’s quite a dull pain, and my face is swollen.
W: Is the tooth sensitive to hot or cold?
M: Yes, it hurts when I drink anything hot.
W: Is the tooth tender when you bite on it?
M: Yes, it is.
W: Does it hurt just during the day or at night as well?
M: It hurts all the time...
W: (18) Your tooth is infected, and there might be an abscess under it. (19) I will give you an antibiotic to reduce the infection. If the swelling doesn’ t go down, I’ m afraid I will have to lance it or perhaps root canal. (20) I want you to return in a week, and I will put a gold post in the tooth before I crown it for you, assuming the root canal treatment is successful. We usually have to let the tooth settle for 3 to 6 months before crowning.
16．What is the woman’s occupation?
17．What is NOT true about the man’s toothache?
18．What might be the cause of the toothache?
19．What will the man do about the toothache?
20．When does the woman want the man for a return visit?