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  3. Speaking two languages rather than just one has obvious practical benefits in an increasingly globalized world. Being bilingua

Speaking two languages rather than just one has obvious practical benefits in an increasingly globalized world. Being bilingua

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问题     Speaking two languages rather than just one has obvious
practical benefits in an increasingly globalized world. Being
bilingual makes you smarter. It can have a profound effect on your
brain, improve your cognitive skills and even shielding against 【M1】______
dementia in old age.
    Bilinguals seem to be more adapted than monolinguals at 【M2】______
solving certain kinds of mental puzzles. The bilingual experience
improves the brain’s so-called executive functions, a command 【M3】______
system that directs the attention processes that we use for planning,
solving problems and performing various other mentally demanded 【M4】______
tasks. These processes include ignoring distractions to stay focused,
switching attention willfully on one thing to another and holding 【M5】______
information in mind.
    The key difference between bilinguals and monolinguals may
be more basical: a heightened ability to monitor the environment. 【M6】______
Bilinguals have to switch languages quite often. It requires keeping
track of changes around in the same way that we monitor our
surroundings when driving. The bilingual experience appears to
influence the brain from infancy to old age and there is reason to
believe that it may also apply to those who learn the second 【M7】______
language later in life.
    Bilingualism’s effects also extend into the twilight years.
Individuals with a higher degree of bilingualism are less resistant 【M8】______
than others the onset of dementia and other symptoms of 【M9】______
Alzheimer’s disease: the higher the degree of bilingualism, the later
the age of onset.
    Nobody ever doubts the power of language. But who would 【M10】______
have imagined that the words we hear and the sentences we speak
might be leaving such a deep imprint?
【M4】
选项
答案demanded—demanding
解析 非谓语动词错误。这里指这些任务需要较高的决策力，不应该用过去分词。
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