e sensitive
periods are neglected , the ideal time for acquiring 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 critical stage has passed.
Experts suggest that speech stages are reached in a fixed sequence and at a constant 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 sounds; at twelve months he can speak sim-
ple words and understand simple commands; at eighteen months he has a vocabulary of three to
fifty words. At three he knows about l ,000 words which he can put into sentences, and at four
his language differs from that of his parents in style rather than grammar.
Recent evidence suggests that an infant is born with the capacity to speak. What is special
about man's brain, compared with that of the monkey, if the complex system which enables a
child to connect the sight and feel of, say, a toy-bear with the sound pattem "toy-bear" . And
even more incredible is the young brain' s ability to pick out an order in language from the mixture
of sound around him, to analyse, to combine and recombine the parts of a language in new ways.
But speech has to be induced, and this depends on interaction between the mother and the
child , where the mother recognizes the signals in the child' s babbling ( 咿呀学语) , grasping and
smiling, and responds to them. Insensitivity of the mother to these signals dulls the interaction
because the child gets discouraged and sends out only the obvious signals. Sensitivity to the
child ' s non-verbal signals is essential to the growth and development of language.
31 . The purpose of Frederick II's experiment was__
A. to prove that children are born with the ability to speak
B. to discover what language a child would speak without hearing any human speech
C. to find out what role careful nursing would play in teaching a child to speak
D. to prove that a child could be damaged without learning a language
32. The reason some children are backward in speaking is most probably that__
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
33 . What is exceptionally remarkable about a child is that
A. he is born with the capacity to speak
B. he has a brain more complex than an animal's
C. he can produce his own sentences
D. he owes his speech ability to good nursing
34. Which of the fonowing can NOT be inferred from the passage?
A. The faculty of speech is inborn in man.
B. Encouragement is anything but essential to a child in language learning.
C. The child' s brain is highly selective.
D. Most children learn their language in definite stages.
35
[责任编辑:bulesky]
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