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.
8. [A] at[B] by [C]of [D]to
9. [A] context [B] mood [C] period [D] circle
10.[A] counterparts [B] substitutes[C] colleagues [D]supporters
（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.
11.[A] Funny [B] Lucky [C] Odd [D] Ironic
12.[A] monitor[B] protect [C] surprise [D] delight
13.[A] between [B] within[C] toward [D] over
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