2. 外语
  3. Any brain exercise is better than being a total mental couch potato. But the activities with the most【C1】______ are those that r

Any brain exercise is better than being a total mental couch potato. But the activities with the most【C1】______ are those that r

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问题     Any brain exercise is better than being a total mental couch potato. But the activities with the most【C1】______ are those that require you to work beyond what is easy and comfortable. Playing【C2】______ rounds of games and watching the latest documentary marathon on the History Channel may not be enough. Just as your muscles grow stronger with use, mental exercise keeps your mental skills and memory in tone. But what kind of exercise is best for the brain? Here are some suggestions.
    Be a lifelong learner. Continuing to learn new things can build and【C3】______ the connections between brain cells.
    【C4】______ your brain. Think of all mental activities as a continuous whole. Watching a TV documentary would be on the passive, mildly challenging end of the【C5】______ while learning how to converse in a new language would be on the active, very challenging end. When it comes to cognitive reserve,【C6】______ challenging tasks have the biggest impact.
    Get uncomfortable. One stereotype of aging is that young people are bold explorers but older people are【C7】______ homebodies who "know what they like." Getting out of your comfort zone from time to time challenges your mental skills. An example of this would be traveling to a city that you haven’t been to before, which forces you to【C8】______ unfamiliar surroundings.
    Be social. Social【C9】______ aging researchers have discovered, puts people at risk of losing some of the brain reserves they have built up over a lifetime. There are many ways to be social. One good way is working as a volunteer in a social setting, which allows you to have contact with【C10】______ types of people and puts you in new situations.
A) endless B) isolation C) maintain D) spectrum
E) evidently F) navigate G) timid H) frantic
I) mentally J) diverse K) impact L) deprive
M) alternative N) excursion O) strain
【C10】
选项
答案J
解析 空格在介词with和名词types之间，应该是修饰types的定语。空格所在句列举了社交合群的方法，即去当志愿者。据此可知，在social setting中肯定会接触到各种各样的人，故diverse符合句意。
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