2018年考研英语一真题（后附答案详解）
Section I Use of English
Directions：
Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on the ANSWER SHEET. (10 points)
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 instruct that leads sheep to flock together for safety and prompts humans to _____(7) with one
another. Swiss Scientists have found that exposure _____(8) this hormone puts us in a trusting _____(9): In a 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 lear