单选题 US. researchers suggest sleeping call help us remember things we have just learnt. A team from Northwestern University 31 that a 90-minute nap(小睡)can help people learn a new skill. The 32 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, 33 memory stabilization." Test volunteers practiced musical tunes before and after a short sleep. 34 the nap, the researchers played one of the tunes the volunteers had practiced. The team found that the participants made 35 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 36 learning a foreign language while you sleep. He said: "The critical 37 is that our research shows that memory is strengthened for something you"ve already learned." He added:"Rather than learning something 38 in your sleep, we"re talking about enhancing an existing memory by reactivating information recently acquired." 39 , Dr. Reuber did say there were possibilities for language learners: "If you were learning 40 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.

【正确答案】 C

【答案解析】[解析] 本题测试词汇。西北大学的研究小组报道说：“90分钟的小睡可以帮助人们学习一样新的技能。”imagine“想象”，learn“得知”，report“报道”，guess“猜测”，report是正确答案。

【正确答案】 D

【答案解析】[解析] 本题测试上下文语义。该句的大意是：科学家认为，清醒的时候获得的信息，在睡眠期间会被重新激活，由此提升了记忆的稳定性。因此本题用promote才能符合语义走向。

【正确答案】 A

【答案解析】[解析] 本题通过介词的选择考查上下文语义。空格前讲到，测试参与者在小睡之前和之后都练习一段旋律。空格处则应该填入during，即“在小睡中，研究者给这些参与者放了一段他练习过的音乐”，发现的结果是参与者在醒来后弹奏小睡时听过的曲子犯的错误比较少。故本题选择A。

【正确答案】 B

【答案解析】[解析] 本题考查语义。空格前的句子提到该研究对学习外语是不起作用的，后面就在解释为什么不起作用呢?因为最关键的区别在于其“只能强化学过的内容”，而不能“学习新的内容”。因此此处填入difference最合适。

【正确答案】 A

【答案解析】[解析] 本题考查逻辑关系。上文说到该研究不适用于学习新知识，空格后讲到对语言学习者有某些帮助的可能性，因此上下文是转折的关系，故此处填入however最合适。

【正确答案】 C

【答案解析】[解析] 本题考查语义。句意是：如果你在白天学习如何说一门外语，在晚上睡眠中重新激活记忆，通过这种方式你是有可能提升学习的。这里填入“如何”说外语是最合适的。