New research conducted by brain researcher Avi Karni of the University of Haifa in Israel explores the possibility that naps hel

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问题     New research conducted by brain researcher Avi Karni of the University of Haifa in Israel explores the possibility that naps help lock in sometimes fleeting long-term memories. A 90-minute daytime【C1】______. might help the most, the study finds.
    "We still don’t know the【C2】______mechanism of the memory process that occurs during sleep, but the【C3】______of this research suggest it is possible to【C4】______up memory consolidation," Karni said.
    Long-term memory【C5】______to  memories that stay with us for years, such as "what" memories -- a car accident that happened yesterday -- or " how to " memories, such as one’s learned【C6】______to play the drums.
    Karni, who【C7】______the study in a recent issue of the journal Nature Neuroscience,【C8】______participants to learn a complex thumb-tapping sequence, then【C9】______the study subjects into two groups: one that【C10】______for an hour, and one that didn’t. The people who took an afternoon snooze showed【C11】______improvement in their performance by that evening.
    "After a night’s sleep the two groups were at the same【C12】______, but the group that slept in the afternoon【C13】______much faster than the group that stayed【C14】______," Karni said.
【C15】______, the study also showed just how much【C16】______a 90-minute nap could help lock in long-term memories.
    "Daytime sleep can【C17】______the time ’how to’ memory becomes【C18】______to interference and forgetting," Karnl said. "【C19】______of 6 to 8 hours, the brain【C20】______the memory during the 90-minute nap. "
【C10】

选项 A、worked
B、napped
C、stayed
D、walked

答案B

解析 动词辨义题。通篇都在介绍白灭小睡对于记忆的影响。故此处实验也该是要证明小睡与不睡对记忆效果的影响。所以应选择nap“小睡,打盹”。整句意为“Karni将研究对象分成两组:一组小睡一小时,另一组不睡”。work“工作”,文章并未研究工作对对忆的影响,可排除;stay“停留,留下”,此处并不是说让一部分人留在某个地方,另一部分离开,不符合文意;walk“散步”对记忆的影响也不是文章讨论的内容,可排除。
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