CLARE: Hi Jake. How are you getting on with the practical teaching? JAKE: It's harder than I expected, but I've got some great classes. How about you? CLARE: Not brilliant. I'm really struggling with my Year 12 science class. JAKE: Are they hard to control? CLARE: Well, I don't have discipline problems as such. It's just that they don't seem to think that science has anything to do with their lives. It's depressing. They listen to what I say, and I gave them a test last week and the results weren't too bad, but there's no real engagement. JAKE: Right. CLARE: And as part of my teaching practice, I have to design an experiment for them to do. I was wondering about something on the children's diets .. . you know, asking them to record what they eat and maybe linking it to their state of health. JAKE: Mmm. Let's think. So your methodology would involve the children recording what they eat. OK, but you'd also need to have access to the children's medical records and I don't think people would be happy about that; confidentiality would be an issue. If you could get the right data, the conclusions might be significant, but I suspect it's not going to be easy. CLARE: Right. JAKE:Have you thought about doing an experiment using animals? CLARE: Wouldn't that be upsetting for the children? JAKE: Well, the animals don't have to be harmed in any way. It could just be an experiment where they're given a certain diet and the effects are observed. CLARE: Would I have to get permission to use animals? JAKE: Yes, you'd have to submit an outline of the experiment and fill in a form, but it's quite straightforward. CLARE: But if we found out that, say, a particular diet affects the health of animals, the same thing wouldn't necessarily be true for people, would it? JAKE: No that's true, but the findings for any experiment are going to be limited. It's inevitable. CLARE: I suppose so. So what animals could I use to investigate the effects of diet? Mice? JAKE: Yes. You'd need experimental mice-ones that have been specially bred for experiments. OK, so what will your experiment be investigating exactly? CLARE: Well, something to do with nutrition. So maybe we could look at food supplements . . . things like extra iron and extra protein, and their impact on health. JAKE: Mmm. That might be rather broad, Maybe just look at the effects of one supplement, like sugar, on the health of the mice? CLARE:In fact, maybe the focus could be on whether mice can control their own diet. JAKE: So, what happens when they have access to more sugar, that they don't really need? CLARE: Exactly, Do they eat it or do they decide to leave it? JAKE: Great. Then later on, you could do a follow-up experiment adding another variable. Like, you could give some of the mice the chance to be more active. running on a wheel or something, and the others just sit around and don't do much. CLARE: Or I could repeat the experiment but change the type of food I provided... or use mice with a different genetic structure. But I think your idea would be more interesting, I might think about that some more. CLARE: So can I talk through a possible procedure for the experiment where mice are given a sugar supplement? JAKE: Sure. I did a similar experiment in college actually. CLARE: Great. So how many mice would I need? JAKE: I'd say about 12. And all young ones, not a mixture of old and young. CLARE: OK. And I'd need two groups of equal sizes, so six in each group. And how would I tell them apart? I suppose I could put some sort of tag on one group... or just mark them in some way? JAKE: You could use food colouring, hat wouldn't hurt them. CLARE: Perfect. Then each group would go into a separate cage, and one group, let's call them group A, would be the control group. So they'd just have ordinary mouse food. I suppose you can buy that? JAKE: Yes, it comes in dry pellets. CLARE: And the other group would have the same as the first group, but they'd also have the extra sugar.， JAKE: Would you just give them straight sugar? CLARE: It might be better to give them something like cereal with it. JAKE: Mmm. Then you'd need to weigh the mice, I should think once a week. And you'd need an electronic balance. CLARE: But we can't hold them on the balance, or it'd affect the reading. JAKE: Exactly. So you need something called a weighing chamber to stop the mice from running away. It sounds complicated, but actually you can just use a plastic box with holes in the top. CLARE: OK. So once we've measured the weight gain of each mouse we can work out the average for each group. as well as he standard deviation. And then see where we go from there. That sounds cool, I think the students will enjoy it. JAKE: Yes. One thing ...
Choose the correct letter, A , B or C .
听前预测： 定位词为 Year 12 science class；限定词为 Clare、students。
题目解析： 开篇稍作背景介绍后，题干定位词 Year 12 science class 原词出现，根据题干人
名限定词 Clare 可知，该题须关注女生提出的信息。女生先提到 I don’t have
discipline problems as such，以及后面提到 They listen to what I say，说明不是
课堂纪律的问题，学生都很听话，判断与选项 B 中 their poor behaviour in class
信息矛盾，因此不选。接着女生提到 It’s just that they don’t seem to think that
science has anything to do with their lives，意为“只是学生似乎认为科学与他们
的生活没有任何关系”，随后女生还提到 no real engagement，意为“学生没有真
正参与进来”，说明学生对科学这门课缺乏兴趣，与选项 C 中 lack of interest in
the subject 信息对应，原文的 depressing 是选项 C 中 frustrated 的替换，因此选
项 C 信息完整，为该题正确答案。女生还提到 I gave them a test last week and the
results weren’t too bad，该句说明学生考试结果不差，与选项 A 信息不一致，因
此不选。
听前预测：定位词为experiment、children's diet；限定词为 Jake、Clare's suggestion。
题目解析：题干定位词 experiment 和 children's diet 由女生提及，根据题干人名限定词 Jake可知，该题须关注男生提出的信息。男生回应 but you'd also need to have access to the children's medical records and I don't think people would be happy about that;confidentiality would be an issue，该句说明男生认为由于保密性，孩子的医疗记录不容易获取，判断与选项B内容一致，为该题正确答案。接着男生提到If you could get the right data, the conclusions might be significant, but I suspect it's not going to be easy，意为“如果你能得到正确的数据，结论可能会很重要，但我认为这并不容易”，该句并没有提到男生担心结果可能没有意义，或者他怀疑结论可能会令人不快，因此选项 A 和选项 C 均不选。
听前预测： 定位词为 experiment、animals；限定词为 problem、agree。
题目解析： 定位词 experiment 和 animals 原词出现，女生先提到 Wouldn’t that be upsetting
for the children，该句可以定位选项 C，男生回答 Well, the animals don’t have to
be harmed in any way，说明实验不会伤害动物（孩子们没有必要不开心），因
此选项 C 不符合文意，故排除。接着女生提到 Would I have to get permission
to use animals 定位到选项 B，男生回答 Yes, you’d have to submit an outline of the
experiment and fill in a form, but it’s quite straightforward，其中 straightforward
说明获取许可很容易，并不复杂，与 B 选项 complicated 信息矛盾，因此排
除。随后女生提到 But if we found out that, say, a particular diet affects the health of
animals, the same thing wouldn’t necessarily be true for people, would it? 该句表明能
影响动物健康的某种特定饮食不一定适用于人类，与选项 A 信息一致，接着男
生表示同意，因此选项 A 为该题正确答案。
听前预测： 限定词为 question、they decide、should address。
题目解析： 该题定位信息较弱，可以结合男生提问 what will your experiment be investigating
exactly 辅助定位。女生回答 maybe we could look at food supplements...things like
extra iron and extra protein, and their impact on health，该句能对应选项 C 的部分
信息，但是男生随后进行了否定 That might be rather broad，因此选项 C 不选。
男生接着提到 Maybe just look at the effects of one supplement, like sugar, on the
health of the mice? 该句与选项 B 部分信息可以对应，但女生提出了新的想法 In
fact, maybe the focus could be on whether mice can control their own diet，该句表示女生认为重点应该放在老鼠是否能控制自己的饮食上，与选项 A 内容表述一
致，男生没有反对，因此选项 A 为该题正确答案。
听前预测： 定位词为 another experiment；限定词为 Clare。
题目解析： 男生提到 follow-up experiment，对应题干信息 another experiment，提示定位
到该题。男生先提出 you could give some of the mice the chance to be more active,
running on a wheel or something, and the others just sit around and don’t do much，该
句对应选项 C 信息，但是女生没有同意，而是提出新的想法 Or I could repeat the
experiment but change the type of food I provided...，该句对应选项 A 信息，但是女
生随后又改变了想法 or use mice with a different genetic structure，该句对应选项
B 信息，最后女生决定 But I think your idea would be more interesting, I might think
about that some more，表明女生最后接受了男生提出的建议，因此本题正确答案
为选项 C。该题有较多反转，考生务必耐心听到最后再作判断。
