第二部分 阅读理解
第一节（共15小题；每小题2分, 满分30分）
A
Researchers tested how long it took participants to switch from one cognitive(认知的) task to another, something that is known to take longer for older adults, said lead researcher, Brian Gold, a neuroscientist at the University of Kentucky.
Gold’s team compared task-switching speeds for younger and older adults, knowing they would find slower speeds in the older population because of previous studies. However, they found that older adults who spoke two languages were able to switch mental activities faster than those who didn’t. The study only looked at life- long bilinguals(会说两种语言的人), defined in study as people speaking a second language daily since they were at least 10 years old.
