U. S. researchers suggest sleeping can help us remember things we have just learnt. A team from Northwestern University【C1】_____

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问题     U. S. researchers suggest sleeping can help us remember things we have just learnt. A team from Northwestern University【C1】______that a 90-minute nap(小睡)can help people learn a new skill. The【C2】______on their research is published in the June edition of the journal Nature. The scientists say: "Information acquired during waking can be reactivated(重新激活)during sleep,【C3】______memory stabilization. " Test volunteers practiced musical tunes before and after a short sleep.【C4】______the nap, the researchers played one of the tunes the volunteers had practiced. The team found that the participants made【C5】______errors when playing the tune that had been played while they slept.
    Study co-author Dr Pau J. Reuber points out the research might not work【C6】______learning a foreign language while you sleep. He said: "The critical【C7】______is that our research shows that memory is strengthened for something you’ve already learned. " He added: "Rather than learning something【C8】______in your sleep, we’re talking about enhancing an existing memory by reactivating information recently acquired. "【C9】______, Dr Reuber did say there were possibilities for language learners; "If you were learning【C10】______to speak in a foreign language during the day, for example, and then tried to reactivate those memories during sleep, perhaps you might enhance your learning," he said.
【C4】

选项 A、During
B、Before
C、At
D、After

答案A

解析 四个选项中,除了C项At不能与the nap搭配外,其他三个介词均可与the nap搭配。但下文the tune that had been played while they slept中的while they slept(在他们睡眠期间)给了本题上下文的语篇线索,正确答案为A项During(在……期间)。其他两项选项均与下文的内容矛盾。
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