M: So, what seems to be the problem today?

　　W: Well, I just came in for a [23]check up and adental cleaning.

　　M: Hum. Open up. Let's take a look.

　　W: Ok. Uh...

　　M: Well, there is a major [24]cavity in one of yourwisdom teeth. Hasn't this given you any trouble?

　　W: Well, the tooth has been bothering me, and it sometimes hurts when I try some grapefruitor an ice-cream. Is it really bad?

　　M: Well, we're going to [25]remove the decay, and then we'll either put a filling in, or if thedecay is extensive, we can't repair it, we might have to put a crown on your tooth. Or as alast resort, we may have to extract the tooth.

　　W: Uh, well, that sounds painful!

　　M: Don't worry. I've done this... once before. Nah, just relax.

　　W: Wait! Aren't you supposed to give me something to dull the pain?

　　M: Uh, chicken. Oh yeah. I almost forgot. We can either use a local anesthetic or laughing gasto minimize the discomfort you might feel. Or you can just grin and bear it.

　　W: Nah, Nah, nah! I can't stand pain, and I'd rather not be aware of what's going on. And, if Ineed a filling, can I get one that looks like my other teeth?

　　M: If we can save the tooth with a filling, [25]I recommend a high-strength silver alloy fillinginstead of a porcelain one. It'll probably last longer.

　　W: [25]OK, well, whatever. Let's get it over with.

　　M: Okay, pleasant dreams. Drill please.

　　Questions 23 to 25 are based on the conversation you have just heard.

　　23. What is the woman's initial reason for visiting the dentist?

　　正确答案：C

　　解析：女士说她来是为了做牙齿检查和洗牙。故答案是C。从选项可猜测问题与女士的牙齿检查有关。行为或行动的目的，通常会在对话的一开头就提出，所以要注意开始部分。

　　24. What problem does the dentist discover?

　　正确答案：D

　　解析：男士说，在女士其中一个智齿上发现有个洞，故答案为D。由选项可猜测问题与牙齿毛病有关。注意wisdom tooth是最后长出来的一颗back tooth。就算不懂两者之间的关系，听到decay就知道答案。

　　25. What is the treatment the woman probably receive?

　　正确答案：A

　　解析：男士说，对蛀牙的治疗可先清除烂掉的部分，然后用填充物把它补上，并建议填充物选银合金比瓷的要好，病人并没有异议。故答案是A。每个选项都含有两到三个信息，需迅速简化，抓住重点。对话结尾三次提到filling一词，凭此即可确定A选项。