Conversation 1
Q1
正确答案：C
定位原文：
Student: Yeah. I need to sell back a textbook. Are you the person I speak to about that?
Employee: I am. But we can’t buy textbooks back just yet, because the bookstore’s buyback period isn’t until next Thursday.
解析：原文中student一开始“I need to sell back a textbook.”阐明了学生的需求，后文与书店工作人员的交流全都是围绕如何sell back该学生的课本，因此答案选C，即书店的buy back规定。
Q2
正确答案：C
定位原文：
Employee: I can look. But we are still putting the list together. Professors have to tell us what books they’ll definitely need again next semester, and the deadline for them to let us know isn’t for a couple of days. So the list I have here is not really complete. Um…what class was the book for?
解析：学生想知道他的课本何时会进入buy back的书单，而工作人员则指出只有当教授告知他们新学期所需课本，才能确定新加入的书本。
Q3
正确答案：D
定位原文：
Employee: … Usually if an updated edition of a textbook is available, professors will go for that one.
解析：工作人员解释如果有更新的版本，教授会要新版书，而学生的旧课本就不会被回购。
Q4
正确答案：BC
定位原文：
Employee: Anyway…if Professor Murphy does put it on the list, it is important thatyou come in as early as possible next Thursday. There’s only a limited number of books we would buy back. Once we get the number of books we need for next semester, we would stop buying them.
Employee: Well, if it’s on the buyback list, we’ll pay fifty percent of what the new price was. But that also depends on what condition the book is in, so it needs to be cleaned up as much as possible.
解析：也就是说一旦开始了buyback，学生要尽快带书去书店，因为回购的数量有限，买够就不会再收书，对应B选项;书店购书，除了数量的限制，也对书本的新旧有要求，“condition”是关键词，要保存完好，对应C选项。
Q5
正确答案：A
定位原文：
解析：重听部分是: If you want the best price for it... 此话是补充学生提问的You mean I have to erase all the pencil marks? 店员的答案是想要强调书本保持干净的重要性。
Lecture 1
Q6
正确答案：C
定位原文：
…one of the things that excites me about the field…is that seemingly insignificant things can suddenly change the way we think about a culture. We are always making new discoveries that have the potential to challenge widely held beliefs.
… But discoveries in Uganda, that’s in Eastern Africa, are throwing that into question. Scientists studying soil samples there discovered evidence of bananas in sediment that was 5,000 years old!
解析：本文采用开门见山的说法，教授一开始就道出主题：One of the important aspects of the field of archaeology ... one of the things that excites me about the field... is that seemingly insignificant things can suddenly change the way we think about a culture. We are always making new discoveries that have the potential to challenge widely held beliefs. 后面就进入了本节lecture主要讨论的考古发现，“discoveries in Uganda, that’s in Eastern Africa, are throwing that into question”.
Q7
正确答案：A
定位原文：
…one of the things that excites me about the field…is that seemingly insignificant things can suddenly change the way we think about a culture. We are always making new discoveries that have the potential to challenge widely held beliefs.
解析：教授说让自己觉得兴奋的是似乎不重要的事情能突然改变我们对一种文化的看法，而我们总是做一些有潜力的新发现来挑战被广泛认同的观点。意思就是有一些看似不起眼的新证据挑战了现有理论。对应选项A。
Q8
正确答案：D
定位原文：
When plants die and rot away, they leave these phytoliths behind. Because different plants produce differently shaped phytoliths, scientists can identify the type of plant from ancient remains.
解析：首先在前文提出了一个重要 term——phytoliths, 并作出了解释。后来开始强调其重要性: Because different plants produce differently shaped phytoliths, scientists can identify the type of plant from ancient remains. 这一句解释了通过exam ancient phytoliths，科学家们可以得到哪些信息——produce是关键词。
Q9
正确答案：AB
定位原文：
But, well, this discovery had other implications for history. As soon as bananas appear in the archaeological record, we know we have contact between Africa and Southeast Asia. It would appear now that this contact occurred much earlier than previously thought.
The early appearance of bananas also suggests that agriculture began in this part of Africa earlier than scientists imagined.
解析：第一处定位对应B选项;第二处定位A选项。
Q10
正确答案：C
定位原文：
But, there are questions about this too. We know that bananas can be a staple food that can support large populations, as they did in Uganda in the more recent past. If bananas were grown thousands of years ago, why don’t we see evidence of large populations thriving in the area earlier?
So, we are left with this mystery. We have what appears to be strong biological evidence that bananas were being cultivated in Uganda as early as 5,000 years ago. But we are missing other kinds of evidence that would conclusively prove that this is so.
解析：教授说，这也有问题，我们知道香蕉作为主要食物供养大量人口，在Uganda之前也是这样，如果说香蕉在几千年前就被种植，为什么我们看不到大量人口在这些区域密集增长呢?然后教授说，这个是遗留的谜团，我们似乎有生物学证据，但是也缺少能直接证明的某些证据。也就是说结论没有被研究支持，对应C选项。
Q11
正确答案：B
定位原文：
Clearly, more research needs to be done. Perhaps by some new scholars from this university? At least give it some thought.
解析：教授之前说到现存研究有缺陷，然后又说到，需要更多的研究投入，也许是这个学校的一些年轻的学者，至少能贡献一些想法。言下之意，前人能做到的就这样了，她是鼓励年轻人，新人，也就是学生们，做一下相关方面的研究。对应B选项。
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