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The most convincing evidence for the importance of adult influence on a child’s intelligence comes from a study of "at risk" chi

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问题     The most convincing evidence for the importance of adult influence on a child’s intelligence comes from a study of "at risk" children. Ramey and Frances Campbell of the University of North Carolina【C1】______with children born into poverty-line households. The children entered the study by four months【C2】______age. During the study, one group spent the day in a center where teachers used games and songs to【C3】______the infants. Another group had no such【C4】______, but they were given nutritional supplements in【C5】______.
   During preschool years the children in the early-education group showed IQ advantages often to 20 points. The highest-risk children showed the【C6】______gains, and at age 15 they had higher reading and math scores.
   What【C7】______for these gains? Ramey and other scientists say early childhood experiences  【C8】______brain growth.
   An infant is bom【C9】______billions of brain cells called neurons. Some are wired to other cells before birth to regulate the【C10】______of life, such as heartbeat and breathing. Others are waiting to be wired to【C11】______him or her interpret and respond to the outside world. Experience dictates the hookups. As the child【C12】______, cells reach out and set up pathways to other cells needed to determine a【C13】______. For instance, the neurons in the eye send branches to the【C14】______cortex, which interprets【C15】______eye sees and, via other branches, 【C16】______the person to react to what is seen. Each time an experience is repeated, the【C17】______are strengthened.
   The first two years of life are an explosion of brain【C18】______and connections. By age two the【C19】______has more than 300 trillion connections. At the same time, cells that aren’t being connected or used are being【C20】______.
【C16】
选项 A、makes
B、shows
C、cues
D、responds
答案A
解析 紧接上题。应该是告诉人对所看的东西如何做反应。只有A项．make可以接不 定式，所以正确答案是A选项。
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