【正确答案】 A

【答案解析】[听力原文] Is there really a magic memory pill or a herbal recall remedy? I have been frequently asked if these memory supplements work. You know, one of these first things I like to tell people when they ask me about the supplements, is that a lot of them are promoted as a cure for your memory. But your memory doesn't need a cure. What your memory needs is a good work-out. So really, those supplements aren't going to give you that perfect memory in the way that they promise. The other thing is that a lot of these supplements aren't necessarily what they claim to be, and you really have to be wary when you take any of them. The science isn't there behind most of them. They're not really well-regulated unless they adhere to some industry standard. You don't really know that what they say is in there, isn't in there. What you must understand is that those supplements, especially in some eastern cultures, are part of a medical practice tradition. People don't just go in a local grocery store and buy these supplements. In fact, they are prescribed and they're given at a certain level, a dosage that is understood by a practitioner who's been trained. And that's not really the way they're used in this country. The other thing that people do forget is that these are medicines, so they do have an impact. A lot of times people are not really aware of the impact they have, or the fact that taking them in combination with other medications might put you at increased risk for something that you wouldn't otherwise being countering or be at risk for. What question is frequently put to the speaker? 四项都以whether开头，其中三项都提到memory。本题考查的内容可能是某处细节或文章的主题，听录音时应将重点放在四项的关键信息上(memory supplements, herbal medicine, exercise, a magic memory)。 题目问的是说话者经常被问到的问题是什么。短文开头就提到是否真的有某种神奇记忆药丸或者某种草药记忆唤醒疗法，人们经常会问“我”这些记忆保健品是否有作用。由此可以得出A项为正确答案。B项只涉及一部分，说法片面，故排除；C项中的“锻炼”虽然在原文中有提及，但这是作者对人们的建议，即提高记忆力所需要的是效果明显的锻炼，故排除；D项的表述与原文内容不符，故排除。

【正确答案】 D

【答案解析】[听力原文] What does the speaker say about most memory supplements? 四项均以they开头，其中三项均描述有利方面。本题考查的内容应该是文中的某处细节，通过对选项内容的理解，可推断本题应该是关于某些药物的作用或特点。听录音时应将重点放在四项的关键词上(help the elderly more, beneficial, side effects, real science)。 题目问的是关于大多数记忆保健品，说话者说了什么。短文中间部分提到它们中的大多数背后并没有科学的支撑，由此可以得出D项为正确答案。A项在原文中并未提及，故排除；短文提到，那些保健品真的不会像其承诺的那样，给你完美的记忆力，故B项也不正确，可排除；短文后面提到，保健品也是药品，所以它们肯定有副作用，故C项也不正确，可排除。

【正确答案】 D

【答案解析】[听力原文] What do we learn about memory supplements in eastern cultures? 四项均以they开头，内容涉及的状态和动作分别为available、taken、collected or grown和prescribed。本题考查的是主语they的某种属性，听录音时应先听清they的指代对象，并将重点放在各选项的关键词上。 题目问的是关于东方文化中的记忆保健品，我们了解到什么。短文后面提到东方文化时，谈到人们不是只去杂货店买这些保健品，其实他们还有医生的处方。由此可知D项为正确答案。A项的表述与原文内容不符，故排除；文中提到会有一定的剂量，但并未说是大剂量，故排除B项；C项的表述在原文中未提及，故排除。

【正确答案】 B

【答案解析】[听力原文] What does the speaker say about memory supplements at the end? 四项涉及的内容都与某些事物所带来的结果(后果或效果)有关，比如选项中提到的helpful、entail unnecessary risks、effect和benefited。通过对选项内容的理解，本题考查的内容应该与后果或者影响有关，听录音时应将重点放在四项的关键词上(mental exercise, unnecessary risks, lasts only a short time, benefited from)。 题目问的是关于记忆保健品，说话者在最后说了什么。短文最后提到，很多时候人们并没有真正意识到它们的副作用，或者与其他药物一同服用可能会增加风险，本来你是不用对抗或者陷入这种危险的。由此可知B项为正确答案。文中并未提及它们跟头脑锻炼一样有帮助，故A项可排除；C项和D项在原文中都没有提及，故都排除。