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  3. Engaging in a hobby like reading a book, making a patchwork quilt or even playing computer games can delay the onset of dementi

Engaging in a hobby like reading a book, making a patchwork quilt or even playing computer games can delay the onset of dementi

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问题     Engaging in a hobby like reading a book, making a patchwork
quilt or even playing computer games can delay the onset of
dementia, a US study suggests. Watching TV but does not【M1】______
count—and indeed spending significant periods of time in front of
the box may speed up with memory loss, researchers found.【M2】______
Nearly 200 people aged 70 to 89 with mild memory problems were
compared to a group who had no impairment. The researchers【M3】______
from the Mayo Clinic in Minnesota asked the volunteers about
their daily activities within the past year and how mental active【M4】______
they had been between the age of 50 to 65. Those who had during
middle age busy reading, playing games or engaging in craft【M5】______
hobbies like patchworking or knitting was found to have a 40%【M6】______
reduced risk of memory impairment. In later life, those same
activities reduced the risk by between 30 and 50%. Those who
watched TV for less than 7 hours a day were also 50% more likely【M7】______
to develop memory loss than those who spent longer than that
staring at the screen.
    "This study is exciting because it demonstrates that age does【M8】______
not need to be a passive process," said study author and
neuroscientist Dr Yonas Geda. "By simply engaging in cognitive
exercise, you can protect against future memory loss. Of course,
the challenge with this type of research is what we are relying on【M9】______
past memories of the participants, therefore we need to conform【M10】______
these findings with additional research."
【M9】
选项
答案what—that
解析 语法错误。what后接的从句意为“我们依赖参与者对过往的记忆”，如果用what引导表语从句，what在句中应该充当某个成分，并且表示“什么”，但从句中不缺少任何成分，所以此处应改为that，在从句中无实际意思。
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