Question 25 is based on the passage you have just heard.

Passage Three

听力原文

    Watching more than 3 hours of television a day doubles memory loss in older people, a new study of more than 3,000 adults suggests. (22) [Scientists at University College London used memory and fluency tests on the same group of people 6 years apart.] They found that those who watched on average less than 3 hours’ television a day showed a decline of around 4 to 5 percent, while those who tended to watch more than 3 hours a day declined by an average of 8 to 10 percent. (23) [The research team say they believe the “alert-but-passive” nature of television watching may be creating stress on the mind, which contributes to memory decline.]

    Older people who watch more television are also less likely to undertake activities known to preserve mental functioning, such as reading, or interactive screen-based pursuits such as using the Internet or playing video games. (24) [The researchers say that television viewing may be a risk factor for Alzheimer’s disease, but more research is needed to establish a link.]

    While watching television may have educational benefits and relaxation benefits, (25) [the researchers advise that adults over the age of 50 should try and ensure that television viewing is balanced with other contrasting activities.] If you’re concerned that the amount of television you’re watching could have a negative impact on your health, you should limit the amount of TV you watch each day and undertake some healthy hobbies.

25. What do the researchers suggest older people do?

解析：B。在录音中，研究者建议50岁以上的人应当尝试并确保可以平衡看电视和进行其他不同活动的时间。因此B选项符合题意，其中television viewing和other contrasting activities属于原词复现。

错项排除：A项利用录音中提到的三小时看电视时间作干扰，但录音中说的是每天看三个小时以上电视的人平均记忆力衰退程度为8%至10%，并未说研究人员建议老年人一天看电视超过三小时，故排除。录音后半部分提到了educational，但这里说的是看电视虽然有些教育意义，但研究者仍建议老年人要平衡看电视和进行其他活动的时间，故排除C项。D项在录音中未提及，故排除。