【听力原文】
Moderator:
Hello, Ladies and Gentleman. I am very pleased to introduce our keynote speaker today, Dr. David Henry. [16] Dr. Henry, the lead researcher from Birmingham University, has published a great many essays and works concerning the functions of the brain. Dr. Henry, please!
Dr. Henry:
Thank you for the introduction. Today, I'd like to talk about a discovery about our brain, that is, remembering makes us forget. Members of my research team watched the volunteers remember one memory which in turn caused them to forget another.
In the experiments we were interested in how the brain creates forgetting. And the challenge was that it's been quite hard to study forgetting because you can't really tell. So what you need to find is something in the brain that tells us what exactly a subject or participant is remembering at a given moment.  [17] So we developed a method that actually allowed us to track individual memories in the brain. We could directly watch the brain while it forgets. And that was quite exciting for us.
[18] In our experiment, we used images which are all like famous people's faces or well-known places around the world or everyday objects, because they are quite well-known to our subjects already. So they are easier to remember in the first place. But also and probably more importantly we found that these pictures elicit quite a distinct signature in the brain. So we can actually tell just based on a participant's brain activity.
You may ask what we have found when we looked at those signatures. Well, they told us when there were words that triggered a memory of two pictures at the same time, the more often we asked participants to only remember one of these pictures, the more we saw the brain picture of that or the brain pattern representing that picture coming up in the brain, but also the more the competing or irrelevant pictures were suppressed by the brain.And that suppression ultimately led people to forget those memories at a later point. So the basic phenomenon which always surprises people that namely that remembering causes forgetting has been known for quite a while.And it's been published in the 1990s.  [19] But the new thing about our study is really that we can actually watch the mechanism behind it. So we can watch the brain while it suppresses memories that it doesn't need any more.
What does the introduction say about Dr. David Henry's essays and works?
【解题思路】四项均以they开头，且均为一般现在时的描述性句子。本题考查的内容应该是关于主语they的相关情况，听录音时应首先弄清they的指代对象，进而将重点放四项的关键信息上(habits affectour behaviour，issues facing office workers，functions of the brain，how memories are developed)。
【解析】讲座开头部分提到亨利博士是伯明翰大学的首席研究员，出版过众多有关大脑机能的论文和著作，因此可以得出C项为正确答案。A、B两项文中未提及，故排除。讲座内容虽然与记忆有关，但并未提到亨利博士的论文和著作揭示了记忆是如何产生的，故D项应排除。