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  3. It is, everyone agrees, a huge task that the child performs when he learns to speak, and the fact that he does so in so short a

It is, everyone agrees, a huge task that the child performs when he learns to speak, and the fact that he does so in so short a

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问题    It is, everyone agrees, a huge task that the child performs when he learns to speak, and the fact that he does so in so short a period of time challenges explanation.
   Language learning begins with listening. Individual children vary greatly in the amount of listening they do before they start speaking, and late starters are often long listeners. Most children will "obey" spoken instructions some time before they can speak, though the word "obey" is hardly accurate as a description of the eager and delighted cooperation usually shown by the child. Before they can speak, many children will also ask questions by gesture and by making questioning noises.
   Any attempt to trace the development from the noises babies make to their first spoken words leads to considerable difficulties. It is agreed that they enjoy making noises, and that during the first few months one or two noises sort themselves out as particularly indicative of delight, distress(痛苦), sociability, and so on. But since these cannot be said to show the baby’s intention to communicate, they can hardly be regarded as early forms of language. It is agreed, too, that from about three months they play with sounds for enjoyment, and that by six months they are able to add new sounds to their repertoire (能发出的全部声音). This self-imitation leads on to deliberate (有意识的) imitation of sounds made or words spoken to them by other people.
选项 A、no explanation is necessary for such an obvious phenomenon
B、no explanation has been made up to now
C、it’s no easy job to provide an adequate explanation
D、it’s high time that an explanation was provided
答案C
解析 细节题。该题测试对词组“challenges explanation”的理解。文中第一段的意思是：“他(孩子)在如此短的时间就能做到这一事实，这是向原有解释提出了质疑。”由此可以看出，对婴儿学习说话这一问题已经有解释，但是不能使人信服。因此，可以得出答案应为C。
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