Trust is a tricky business On the one hand， it ‘s a necessary condition ____1___ many wort

hwhilethings： child care， friendships， etc On the other hand， putting your ___2___， in the wrong placeoften carries a high ___3___.

___4___， why do we trust at all？ Well， because it feels good ___5___ people place their trust in anindividual or an institution， their brains release oxytocin， a hormone that ___6___ pleasurable feelingsand triggers the herding instruct that prompts humans to ___7___ with one another Scientists havefound that exposure ___8___ this hormone puts us in a trusting ___9___： In a Swiss study， researcherssprayed oxytocin into the noses of half the subjects； those subjects were ready to lendsignificantly higher amounts of money to strangers than were their ___10___ who inhaled somethingelse ___11___ for us， we also have a sixth sense for dishonesty that may ___12 ___us .

A Canadian studyfound that children as young as 14 months can differentiate ___13___ a credible person and a dishonestone Sixty toddlers were each ___14___ to an adult tester holding a plastic container.The testerwould 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 thetester in learning a new skill， demonstrating that they trusted his leadership ___19___， only five ofthe 30 children paired with the “___20___”tester participated in a follow-up activity.

1_________

A.on

B.like

C.for

D.from

4A.Therefore

B.Then

C.Instead

D.Again

3A.benefit

B.debt

C.hope

D.price

17A.betrayed

B.wronged

C.fooled

D.mocked

18A.forced

B.willing

C.hesitant

D.entitled

20A.inflexible

B.incapable

C.unreliable

D.unsuitable

5A.Until

B.Unless

C.Although

D.When

16A.discovered

B.proved

C.insisted

D.remembered

19A.In contrast

B.As a result

C.On the whole

D.For instance

6A.selects

B.produces

C.applies

D.maintains

9A.context

B.mood

C.period

D.circle

8A.at

B.by

C.of

D.to

7A.consult

B.compete

C.connect

D.compare

10A.counterparts

B.substitutes

C.colleagues

D.supporters

12A.monitor

B.protect

C.surprise

D.delight

13A.between

B.within

C.toward

D.over

11A.Funny

B.Lucky

C.Odd

D.Ironic

2A.faith

B.concern

C.attention

D.interest

14A.transferred

B.added

C.introduced

D.entrusted

15A.out

B.back

C.around

D.inside

请帮忙给出每个问题的正确答案和分析，谢谢！