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聽力文本：
As we hit middle age, we often start to notice that our memory and mental clarity are not what they used to be.
人到中年，我們通常會開始發覺自己的記憶力和腦力不如從前。
We suddenly can't remember where we put the keys just a moment ago, or an old acquaintance's name, or the name of an old band we used to love.
我們會突然忘記自己把剛放下的鑰匙放哪了，或想不起舊相識的名字或曾經非常喜歡樂隊的名字。
This loss of mental focus can potentially have a bad impact on our professional, social, and personal well-being.
這種心智上注意力的缺失可能會對我們的工作、社交以及個人生活產生不好的影響。
Neuroscientists are increasingly showing that there's actually a lot that can be done.
神經學家不斷表明很多方法可以幫助改善這一情況。
It turns out that the brain needs exercise in much the same way our muscles do, and the right mental workouts can significantly improve our basic cognitive functions.
事實上，大腦和肌肉一樣需要鍛煉，而且正確的鍛煉方式可以大幅提高大腦的認知功能。
Thinking is essentially a process of making neural connections in the brain.
思考從本質上來說是大腦中神經元之間發生聯系的活動。
To a certain extent, our ability to excel in making the neural connections that drive intelligence is inherited.
決定人們智力高低的這種神經聯系在一定程度上由遺傳決定。
However, because these connections are made through effort and practice, scientists believe that intelligence can expand and fluctuate according to mental effort.
然而，由于這種聯系同時也是通過努力和練習實現的，科學家因此相信通過心智的練習，人們的智力水平可以得到提升或上下波動。
Now, a new San Francisco web-based company has taken a further step and developed the first "brain training program", Lumosity, to actually help us improve and regain our mental sharpness.
基于這一理論，舊金山一家新創立的網絡公司采取了進一步行動，開發了一個名為Lumosity的“益智游戲”，旨在提高或恢復我們的思維敏捷性。
Lumosity, is far more than an online place to exercise our mental skills.
Lumosity不僅僅是一個益智平臺，
The program keeps track of our progress and provides detailed feedback on our performance and improvement.
這款軟件記錄我們取得的進步并對我們的成績和進步給出詳細反饋。
Most importantly, it constantly modifies and enhances the games we play to build on the strengths we are developing—much like an effective exercise routine requires us to increase resistance and vary our muscle use.
最重要的是，與日常的健身鍛煉增強人體韌性和肌肉多種拉伸類似，它通過對游戲不斷更新和完善，鞏固提高我們希望得到的能力。
Questions 19-22 are based on the passage you have just heard.
請根據剛聽到的短文回到19-22題。
Question 19. What common problem do middle-aged people have?
19.中年人遇到的普遍問題是什么？
20.Question What good can thinking do to people?
20.思考對人有什么好處？
21.Question What's the purpose of designing the program Lumosity?
21.Lumosity程序的設計意圖是什么？
22.Question What is the most important feature of Lumosity?
22.Lumosity最重要的特色是什么？
