2018 完形填空（英语一）

Trust is a tricky business.

On the one hand, it's a necessary condition for many worthwhile things: child care, friendships, etc.

On the other hand, putting your faith in the wrong place often carries a high price.

Then, why do we trust at all?

Well, because it feels good.

When people place their trust in an individual or an institution, their brains release oxytocin, a hormone that produces pleasurable feelings and triggers the herding instinct that prompts humans to connect with one another.

Scientists have found that exposure to this hormone puts us in a trusting mood: 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 counterparts who inhaled something else.

Lucky for us, we also have a sixth sense for dishonesty that may protect us.

A Canadian study found that children as young as 14 months can differentiate between a credible person and a dishonest one.

Sixty toddlers were each introduced to an adult tester holding a plastic container.