Performing better under pressure
What is the most stressful thing in school? It is probably exams．小题1:． But some students succeed under pressure，while others struggle．So，why do some students perform better under stress?
It all comes down to dopamine （多巴胺）． Dopamine is a chemical in our body that sends signals （信号） in the brain．It has many important roles：affecting memory，attention and how we learn．小题2:．
Our brains control dopamine in two ways．It either takes out dopamine quickly，or gradually．Exam success can be linked to how fast dopamine goes back to a balance，according to new research from the University of Missouri，reported Yahoo．
小题3:． If you become stressed，your brain will start to overload （起负荷） on dopamine．It is like a cup overflowing with water．The quicker you are able to go back to a balance of dopamine，the quicker you can concentrate．小题4:．
Researchers found that，during a test，people who slowly got back to a balance of dopamine scored 8 percent lower． That’s me difference between a good mark and a bad mark．
But don't fear，there is good news for every student．小题5:． So，it turns out that practice really makes perfect．
根据短文内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使短文意思通顺、内容完整，并在答题卡上将该项涂黑。
A．This will help you perform better on a test．
B．Exams can put us under a lot of pressure．
C．The study also found that the more practice you get，the less stressed you’ll be．
D．What happens when we take an exam?E．Our brains work best when there is a balance of dopamine—not too much or too little．
