专八改错练习第二十六篇：
Is language, as food, a basic human need? Judging __1__
from the drastic experiment of Frederick in the
13th century it may be. Hoping to discover what
language a child would speak if he heard mother __2__
tongue, he told the nurses to keep silent.
Today no such drastic deprivation exists as ordered __3__
by Frederick. Furthermore, some children are still __4__
backward in speaking. Most often the reason for this is that themother is insensitive to the cues and signals of the infant, whose brain is programmed to
mop up language rapidly. There are critical times, it seems, when children learn more readily. Ifthese sensitive periods are neglected, the ideal time for
acquiring skills passes away and they might never be __5__
learned so easily again.
Linguists suggest that speech milestones 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 up to be of high IQ. Recent __6__
evidence suggests that an infant is born of the __7__
capacity to speak. But speech has to be triggered,
and this depends on interaction between the mother
and the child,where the mother realizes the cues and __8__
signals in the child's babbling, grasping, crying,
smiling, and responds to it. Insensitivity of the __9__
mother to these signals dulls the interation because
the child gets discouraged and sends out only obvious
signals. Sensitivity to the child's verbal cues is __10__
essential to the growth and development of language.
（责任编辑：liushengbao）
