《2025年夺冠金卷八年级英语下册仁爱版》

C
What is the most stressful(有压力的) thing in school? It is probably exams. 11 But some students do well under pressure(压力), while others feel terrible. So, why do some students perform better under stress?
It all comes down to dopamine(多巴胺). 12 It has many important roles: affecting memory, attention and how we learn. Our brains work best when there is an even balance of dopamine—not too much or too little.
The brain controls dopamine in two ways. It either takes out dopamine quickly, or gradually. Exam success can be linked to how fast dopamine goes back to an even balance.
What happens when we take an exam? 13 It is like a cup overflowing with water. The quicker you are able to go back to an even balance of dopamine, the quicker you can concentrate(聚精会神), helping you perform better on a test.
Scientists found that, during a test, people who slowly got back to an even balance of dopamine scored 8 percent lower. 14
But don't fear, there is some good news. 15 So, it turns out that practice really does make perfect.
根据材料内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使文章意思通顺、内容完整。
A. That's the difference between a good mark and a bad mark.
B. If you become stressed, your brain will start to overload(超负荷) on dopamine.
C. Exams can put us under a lot of pressure.
D. The study also found that the more practice you get, the less stressed you'll be.
E. Dopamine is a chemical(化学物质) in our brains that sends signals(信号) to our body.
11. ________ 12. ________ 13. ________ 14. ________ 15. ________

答案： 11~15 CEBAD