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  3. Trust is a tricky business. On the one hand, it’s a necessary condition【B1】______many worthwhile things; child care, friendships

Trust is a tricky business. On the one hand, it’s a necessary condition【B1】______many worthwhile things; child care, friendships

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问题     Trust is a tricky business. On the one hand, it’s a necessary condition【B1】______many worthwhile things; child care, friendships, etc. On the other hand, putting your【B2】______in the wrong place often carries a high【B3】______.
    【B4】______, why do we trust at all? Well, because it feels good. 【B5】______people place their trust in an individual or an institution, their brains release oxytocin, a hormone that【B6】______pleasurable feelings and triggers the herding instinct that prompts humans to【B7】______with one another. Scientists have found that exposure【B8】______this hormone puts us in a trusting【B9】______: In a Swiss study, researchers sprayed oxytocin into the noses of half the subjects; those subjects were ready to lend significantly higher a-mounts of money to strangers than were their【B10】______who inhaled something else.
    【B11】______for us, we also have a sixth sense for dishonesty that may【B12】______us. A Canadian study found that children as young as 14 months can differentiate【B13】______a credible person and a dishonest one. Sixty toddlers were each【B14】______to an adult tester holding a plastic container. The tester would ask, "What’s in here?" before looking into the container, smiling, and exclaiming, "Wow!" Each subject was then invited to look 【B15】______Half of them found a toy; the other half【B16】______the container was empty and realized the tester had【B17】______ them.
    Among the children who had not been tricked, the majority were【B18】______to cooperate with the tester in learning a new skill, demonstrating that they trusted his leadership.【B19】______, only five of the 30 children paired with the "【B20】______"  tester participated in a follow-up activity.   
【B10】
选项 A、counterparts
B、substitutes
C、colleagues
D、supporters
答案A
解析 考查名词辨析。本题所在句是实验研究发现，实验对象为一半受试者的鼻子里喷洒催产素以及吸入其他东西的受试者，吸入其他东西的受试者是起对照作用的受试对象。因此A选项counterparts“相对应的人或物”符合文意，故选A。
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