单选题
Some children are backward in speaking probably because ______.
A、
they are incapable, of learning language rapidly
B、
they are exposed to too much language at once
C、
their mothers respond inadequately to their attempts to speak
D、
their mothers are not intelligent enough to help them
【正确答案】
C
【答案解析】
[试题分析] 本题为细节题。
[详细解答] 问儿童在语言习得方面进展迟缓是因为什么。短文第三段第三句说，许多情况下一些孩子语言习得进展缓慢是因为：他们的脑子天生就具有快速掌握语言的能力，而他们的母亲对其交流信号往往不敏感。C项与该信息基本一致，故为正确选项。
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