2. 外语
  3. A. acquiring B. capacity C. consequently D. constant E. continuous F. critical G. glossary H. nevertheless

A. acquiring B. capacity C. consequently D. constant E. continuous F. critical G. glossary H. nevertheless

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问题    A. acquiring   B. capacity    C. consequently    D. constant    E. continuous
   F. critical    G. glossary    H. nevertheless    I. programmed  J. quiet   
   K. reason    L. silent     M. sounds      N. tuned     O. vocabulary ........
   Is language, like food, a basic human need without which a child at a critical period of life can be starved and damaged? Judging from the drastic experiment of Frederick II in the thirteenth century, it may be. Hoping to discover what language a child would speak if he heard no mother tongue, he told the nurses to keep 【C1】______.
   All the infants died before the first years. But clearly there was more than lack of language here. What was missing was good mothering. Without good mothering, in the first year of life especially, the 【C2】______ to survive is seriously affected.
   Today no such severe lack exists as that ordered by Frederick. Some children are 【C3】______ still backward in speaking. Most often the 【C4】______ for this is that the mother is insensitive to the signals of the infant, whose brain is 【C5】______ to learn language rapidly. If these sensitive periods are neglected, the ideal time for 【C6】______ skills passes and they might never be learned so easily again. A bird learns to sing and to fly rapidly at the right time, but the process is slow and hard once the【C7】______stage has passed.
   Experts suggest that speech stages are reached in a fixed sequence and at a 【C8】______ age, but there are cases where speech has started late in a child who eventually turns out to be of high IQ. At twelve weeks a baby smiles and makes vowel-like 【C9】______; at twelve months he can speak simple words and understand simple commands; at eighteen months he has a 【C10】______ of three to fifty words. At three he knows about 1,000 words which he can put into sentences, and at four his language differs from that of his parents in style rather than grammar.
【C10】
选项
答案O
解析 不定冠词a提示空格处应填入可数名词单数。下文的three to fifty words“3-50个单词”指词汇量，vocabulary符合语义，故选O。此处强调的是孩子的词汇量，因此不能选glossary“词汇表”。
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