Questions 19 to 21 are based on the conversation you have just heard.
19. What is the woman’s problem?
B)。【解析】四个选项均为现在完成进行时态，由此可以推断，本题考查的内容可能是某人最近一段时间发生的事情或者持续的状态。女士解释说，抱歉，昨天没有来上课(missing class)。男士说，并不仅仅是昨天，一共上过6次课，已经缺了4次。由此可见女士的问题在于并没有每天都来上课(hasnt been attending class every day)。故正确答案为B)。
20. How many classes has the woman attended?
A)。【解析】四个选项均为数字，由此可以推测，本题的考查内容是关于数字的。 从男士的话中可知，一共上过6次课，女士一共缺了4次(missed 4)。相减得到女士上课的次数为2次。故正确答案为A)。
21. What does the woman decide to do?
C)。【解析】四个选项均为不定式，由此可以推测，本题考查的内容可能是关于某个决定。女士说如果可行，就决定退课(drop the class)。可见女士打算放弃这门课程，故正确答案为C)。
Conversation Two
W: Dr.Thomas? This is Keet Bradley from the daily news.(22)I’d like to ask you some questions about the new official standard weight that you purchased.
M: I’d be happy to help you. What would you like to know?
W: First of all, how was the standard weight used?
M: Well, the people in our department (23)use it to check the scales all over the country. The department of weights and measures, we are a government agency. It’s our responsibility to see that (23)all the scales measure a kilogram accurately so this is the way we use to adjust the scales.
W: How did you check the scales before?
M: We have an old standard weight that we used to use.(24)It had to be replaced because it was imprecise. You see it was made of poor quality metal that was too porous. It absorbed too much moisture.
W: Oh. So when the weather was humid it weighed more and when it was dry it weighed less.
M: Exactly. And that variation can affect the standards of the whole country. So our department had the new weight made out of higher quality metal.
W: How much did it cost?
M: About 45 thousand dollars.
W: 45,000 dollars? For one kilogram weight? That’s more expensive than gold.(25)Is it really worth that much?
M: (25)I’m sure it is. Industries depend on our government agency to monitor the accuracy of scales so that when they buy and sell their products there is one standard. Think of the drug industry, for example, those companies rely on high accuracy scales to manufacture and package medicine.
Questions 22 to 25 are based on the conversation you have just heard.
22. What is the conversation mainly about?
B)。【解析】四个选项均为概括性比较强的短语，由此可以推测，本题考查的内容很有可能是对话的主题。由metals，measuring weight，metric等词推测，对话可能与金属或其他某种事物的度量有关系。 女士说她想问男士几个关于新度量衡的问题(new official standard weight)，由此揭示对话谈论的主题是关于衡量重量标准的单位。
23. What was the standard weight used to do?
A)。【解析】四个选项均为不定式，由此可以推测，本题考查的内容可能是目的或行为。 男士说他们用新标准度量衡来检测全国的天平(scales)，他们有责任利用它来确保所有的天平都能够准确地测量1公斤的重量(measure a kilogram accurately)。
24. Why was it necessary to replace the old standard weight?
C)。【解析】四个选项均描述某件事物的缺点或问题，由此可以推测，本题考查的内容可能是某件事物的弊端。 男士说旧天平会被取代是因为它不够精准(imprecise)，制造材料低劣(made of poor quality metal)。故正确答案为C)。
25. What does Dr.Thomas probably think about the cost of the new weight?
C)。【解析】四个选项均为对某件事物价值的描述，由此可以推测，本题考查的内容可能是对某件事物价值的评价。女士问男士新度量衡是否物有所值(worth that much)，男士说确定如此。由此可以推断男士认为新度量衡是物有所值的。故正确答案为C)。
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