A set of genes play a role in learning to read and do math, but this ability is not just gene-driven,【C1】________schooling and h

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问题     A set of genes play a role in learning to read and do math, but this ability is not just gene-driven,【C1】________schooling and help from parents are also vital【C2】________.
    Early mathematical ability and literacy are known to【C3】________in some families, but the genes【C4】________affect this have until now been【C5】________unknown.
    Scientists looked into a data pool called the Twins Early Development Study, which【C6】________12-year-olds from nearly 2,800 British families.
    The team compared twins and【C7】________children to see how they【C8】________in tests for maths and reading comprehension, and then matched the children’s genomes.
    Between 10 percent and half of the genes in-volved in reading were also involved in math, they found, and tiny variants in these【C9】________genes influence skill level.
    【C10】________it’s also clear how important our life experience is in making us better at one or the other. It’s this complex【C11】________of nature and nurture as we grow up【C12】________shapes who we are.
    Professor Robert Plomin said the study was the first to estimate the【C13】________from DNA alone on learning ability.
    But, he stressed, the genetic valiants that were identified were not【C14】________"literacy or numeracy" genes.
    【C15】________they formed part of a more complex mechanism in which many genes each【C16】________a small, but combined, effect on learning ability.
    "Children differ【C17】________in how easy or difficult they find learning, and we need to recognize and【C18】________these individual differences," said Plomin.
    "Heritability does not【C19】________that anything is set in stone—it just means it may take more effort from parents, schools and teachers to【C20】________the child up to speed."  
【C8】

选项 A、proceeded
B、operated
C、performed
D、succeeded

答案C

解析 研究组要看的是这些孩子在数学测试和阅读理解力和流利程度方面的情况,因此推断空格处填入的词应具有“做得怎么样”的含义,perform“表现”符合要求,故选C。A项proceeded“继续做”,上文并未提到他们参加考试,因此谈不上“继续做”。B项operated“操作”通常指机器等的操作,用于此不合适。D项succeeded表示“成功”,如果都成功,那就没有比较的意义了,故排除。
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