15．
Sweaty palms，shaking hands and a racing heart!This is what many students experience when they take a big test．When anxiety（焦虑）kicks in，students can completely lose concentration，leading to pool scores．But is there any solution to such stress？
The key to reducing test anxiety is writing．According to a recent report in the journal Science，taking a few minutes before an exam to write about all those fears could help students perform better．
The study was conducted by Professor Sian L．Beilock，from the University of Chicago，and his graduate student Gcrardo Ramirez．
First，the researchers asked 20college students to take a maths test to get a base-lined score．Next，they told the students that they could get a monetary award if they got a good score，and that they were being videotaped．
Before beginning the main test，the researchers asked one group of students to spend 10minutes writing down their anxieties about the test，while the other group sat quietly．Both groups then took the same exam．
The researchers found that students who sat quietly did 12% worse than they had on the pre-test，and the ones who wrote about their anxieties improved their scores by 5%．
Writing enables students to feel refreshed when facing challenging questions on the examination．However，experts also warn that such a change will not cause students to become any smarter．It can only make them become more relaxed and focused．
69．According to the writer，when people feel anxious，they mayD．
A．drink a lot of water
B．have a heart attack
C．kick their feet
D．lose concentration
70．The best way to reduce test anxiety isB．
A．to sit quietly
B．to write about your fears
C．to cool your palms
D．to study hard
71．The study was conducted byC．
A．Professor Sian L．Beilock alone
B．Professor Sian L．Beilock and his wife
C．Professor Sian L．Beilock and his graduate student
D．Professor Sian L．Beilock and his teammate
72．From the experiment，we learn thatB．
A．the two student groups took different tests
B．they could earn money if they did well
C．they needed to finish the test within 10minutes
D．they were asked to relax before the test
73．Students who sat quietly before the testD than they had on the pre-test．
A．did 5% better
B．did 12% better
C．did 5% worse
D．did 12% worse
74．The result of the research has proved that______．
A．writing before a test can make you smarter
B．you can become relaxed by writing before a test
C．the two student groups both did well in the exam
D．students dislike challenging questions on the examination．
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