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  3. For a long time, researchers have tried to nail down just what shapes us—or what, at least, shapes us most. And over the years,

For a long time, researchers have tried to nail down just what shapes us—or what, at least, shapes us most. And over the years,

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问题     For a long time, researchers have tried to nail down just what shapes us—or what, at least, shapes us most. And over the years, they’ve had a lot of finding moments. First it was our parents, particularly our mothers. Then it was our genes. Next it was our peers, who show up last but hold great sway. And all those ideas were good ones—but only as far as they went.
    The fact is once investigators had exposed all the data from those theories, they still came away with as many questions as answers. Somewhere, there was a sort of temperamental dark matter exerting an invisible gravitational pull of its own. More and more, scientists are concluding that this un explained force is our siblings.
    From the time they are born, our brothers and sisters are our collaborators and coconspirators, our role models and cautionary tales. They are our scolds, protectors, goads, tormentors, playmates, counselors, sources of envy, objects of pride. They teach us how to resolve conflicts and how not to; how to conduct friendships and when to walk away from them. Sisters teach brothers about the mysteries of girls; brothers teach sisters about the puzzle of boys. Our spouses arrive comparatively late in our lives; our parents eventually leave us. Our siblings may be the only people we’ll ever know who truly qualify as partners for life. "Siblings," says family sociologist Katherine Conger, "are with us for the whole journey."
    Within the scientific community, siblings have not been wholly ignored, but research has been limited mostly to discussions of birth order. Older sibs were said to be strivers; younger ones rebels; middle kids the lost souls. The stereotypes were broad, if not entirely untrue, and there the discussion mostly ended.
    But all that’s changing. At research centers in the U.S., Canada, Europe and elsewhere, investigators are launching a wealth of new studies into the sibling dynamic, looking at ways brothers and sisters steer one another into—or away from—risky behavior; how they form a protective buffer against family upheaval; how they educate one another about the opposite sex; how all siblings compete for family recognition and come to terms over such impossibly charged issues as parental favoritism.
    From that research, scientists are gaining intriguing insights into the people we become as adults. Does the manager who runs a congenial office call on the peacemaking skills learned in the family playroom? Do husbands and wives benefit from the inter-gender negotiations they waged when their most important partners were their sisters and brothers? All that is under investigation. "Sib lings have just been off the radar screen until now," says Conger. But today serious work is revealing exactly how our brothers and sisters influence us.
选项 A、Previous findings revealed what shapes us.
B、Previous findings were accurate and trustworthy.
C、Previous findings contributed in a limited way.
D、Previous findings went too far in explanation.
答案C
解析 推理判断题。由题干定位至首段，该段首先指出研究人员一直以来想弄清楚的一个问题：是什么塑造了人?第二句指出他们有了许多发现：父母、基因、同龄人等。最后末句指出：这些想法都很好。接着话锋一转，but only as far as they went说明是有条件的"好"。前一句的who show up last but hold great sway意为"最后出现但是影响力最大"，结合末句内容可以得出结论：先前有关what shapes us这个问题的答案在某种程度上是对的。答案选项与此意思相近，故为答案。首段为典型的新老对比型开篇模式，在对先前的研究成果进行肯定之后，话锋一转，引出文章论点。
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