根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余。
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?
A: ____
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! B. What's the problem? C. Visit the dentist often. D. What did the dentist say? E. He couldn't sleep well because of it. F. How often does he ~visit the dentist? G. Hey, Susie, did you see Ken this morning? |
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CH3COO-+H+对于该平衡，下列叙述正确的是