文章大意:本文是一篇说明文,文章介绍了青少年常常忽略母亲的声音,而小时候则非常听话。文章解释了这一现象背后的原因:大脑为了适应不同成长阶段对外界的不同需求,因此在不同年龄阶段对不同人的声音反应程度有不同。
7 . Do you sometimes ignore your mom while chatting with friends? If you’re a teen, that’s fairly ________. And new researches may explain why so many adolescents ________ their mom’s voices.
Young kids’ brains are very tuned in to their mothers’ voices. But as they grow up, everything ________. Teenagers’ brains are more tuned in to strangers’ voices. This obvious ________ usually happens between ages 13 and 14. That’s when teenagers are in the course of puberty (青春期), a roughly decade-long transition into adulthood.
Researchers scanned the brains of 7 to 16-year-olds as they listened to things said by their mothers or by unfamiliar women. The words were purely ________: teebudieshawlt, keebudieshawlt and peebudieshawlt. As the kids listened, certain parts of their brains became ________. This was especially true in brain regions that help us to ________ rewards and pay attention. That’s exactly as it should be. The experiments show that those parts of their brains react more strongly to the unfamiliar voices than to their mothers’.
These areas in the adolescent brains don’t stop ________ mom. It’s just that unfamiliar voices become more rewarding and worthy of attention. “As kids ________, their survival depends less and less on maternal support. ________ , they rely more and more on their ________—friends and others closer to their own age. So the brains need to begin paying more attention to that wider world. The brain seems to ________ new needs that come with adolescence.”
However, mothers’ voices still have special power, especially in times of ________. Studies also showed that levels of stress hormones (荷尔蒙) ________ when stressed-out girls heard their moms’ voices on the phone.
So while both teens and their parents sometimes feel frustrated by missed messages, that’s okay. “That’s the way the ________ is wired, and there’s a good reason for it.”
1. A.common | B.rare | C.strange | D.impossible |
2. A.put up | B.tune out | C.listen to | D.show off |
3. A.changes | B.matters | C.evolves | D.counts |
4. A.action | B.shift | C.ability | D.function |
5. A.complicated | B.meaningful | C.nonsense | D.nonstop |
6. A.numb | B.small | C.calm | D.active |
7. A.collapse | B.design | C.detect | D.process |
8. A.keeping out | B.responding to | C.working with | D.turning down |
9. A.struggle | B.advance | C.shrink | D.mature |
10. A.Once | B.Otherwise | C.Instead | D.Besides |
11. A.strangers | B.competitors | C.partners | D.peers |
12. A.adapt to | B.appeal to | C.apply to | D.attach to |
13. A.stress | B.relief | C.safety | D.plenty |
14. A.varied | B.dropped | C.topped | D.remained |
15. A.head | B.mind | C.heart | D.brain |