A: You have nice teeth, Lily. You must take good care of (好好爱护) them.
B: Thank you. I try! .
A: Yes, I talked to him after he went to see a dentist.
B: He went to the dentist?
A: Why is that great?
B: He had a toothache (牙痛) yesterday. I told him to go to a dentist.
A: Brush your teeth two or three times a day.
B: What e/se (别的) did the dentist say?
A: Get a new toothbrush every three or four months.
B: Didn't the dentist tell Ken anything else?
B: Yes, but what about Ken's tooth?
A: Oh! The dentist found a small piece of food under Ken's gums (牙龈). Ken needs to floss (用牙线剔牙) every day.
B: Wow. He just needed to floss!
A. That's great!