The study brings to our notice that only with the right personality, music and task, can the presence of music significantly improve cognitive functioning. So next time when you want to switch on the music before you study, please think twice.
51. Why is music good for heart health according to the passage?
A. Because it can make links among people.
B. Because it can reduce stress and ease pain.
C. Because it can improve workout staying power.
D. Because it can reduce blood pressure and heart rate.
52. The underlined word "cognitive" in Paragraph 3 is similar to "________________".
A. mental
B. active
C. difficult
D. important
53. The author writes this passage to tell students about ____________.
A. the effectiveness of listening to music while studying
B. the disadvantages of listening to music while studying
C. the factors about how music affects their mental performance
D. the methods of how to choose right music to improve their learning
八、阅读短文, 根据短文内容回答问题。（共10分, 每小题2分）
Throughout history, most masks are made to change identity. Medical masks, on the other hand, are meant to protect. Here is a brief history of their evolution.
17th century
Doctors wore a uniform that included a headdress with a long, pointed beak filled with aromatics （芳香料）to stop bad smell and fight against contagion（传染）carried by bad air. The historical mask is on show in a museum in Berlin.
19th century
In an article in Scientific American in 1878, A. J. Jessup, a New York physician, recommended cotton masks to limit contagion during epidemics (widespread of a disease). However, his idea did not catch on.
Early 20th century
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