In the beginning of paragraph one we are told that scientists can not agree ______. What does "some" in the second sentence of

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问题 In the beginning of paragraph one we are told that scientists can not agree ______.
What does "some" in the second sentence of paragraph one stands for?

选项 A、Parents
B、Children
C、Experiences
D、Genes

答案D

解析 首先找到包含some的句子:So researchers led by Robot Plomin of London’s Institute of Psychiatry decided to look for some.“some”指代前面的复数名同,因此到前句中查找“some”的呼应内容: In the angry debates over how much of IQ comes from the genes that children inherit from parents and how much comes from experiences,one little fact gets overlooked:no one has identified any genes (otherd) mthose that cause retardation)that affect intelligence.前句的最后部分的结构中提到“还没有人确认影响智力的基因 (复数名词)”,包含“some”的句子说“研究者决定找出一些”,根据前后句的句意判断“some”应该指代基因。
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