(标题选自2021年全国硕士研讨生招生考试英语（一）试题)
trust is a tricky business. on the one hand, it’s a necessary condition 1 many worthwhile things: child care, friendships, etc. on the other hand, putting your 2 in the wrong place often carries a high 3 .
4 , why do we trust at all? well, because it feels good. 5 people place their trust in an individual or an institution, their brains release oxytocin, a hormone that 6 pleasurable feelings and triggers the herding instinct that prompts humans to 7 with one another. scientists have found that exposure 8 this hormone puts us in a trusting 9 : in a swiss study, researchers sprayed oxytocin into the noses of half the subjects; those subjects were ready to lend significantly higher amounts of money to strangers than were their 10 who inhaled something else.
11 for us, we also have a sixth sense for dishonesty that may 12 us. a canadian study found that children as young as 14 months can differentiate 13 a credible person and a dishonest one. sixty toddlers were each 14 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 15 . half of them found a toy; the other half 16 the container was empty—and realized the tester had 17 them.
among the children who had not been tricked, the majority were 18 to cooperate with the tester in learning a new skill, demonstrating that they trusted his leadership. 19 , only five of the 30 children paired with the “ 20 ” tester participated in a follow-up activity.

答案：
1-5 aadbd
6-10 bcdba
11-15 bbacd
16-20 acbac

0

同学们，每天做完题记住在留言区回复“打卡第x天”，看看谁能真实坚持下来，信赖坚持到最终的同学都能考上研讨生！同学们，冲鸭！！