Researchers said in a new report that by 2050, half of the world's population will be short-sighted. It has a medical name called myopia. It is also known as near-sightedness. It is when we have difficulty seeing something that are far away from us. The researchers say that around 4.8 billion people will have the problem of myopia. It will increase seven times from 2000 to 2050. Sixty years ago, around 15 percent of the Chinese population was short-sighted. Now, almost 90 percent of Chinese teenagers and young adults have trouble seeing faraway things. A new report found that up 95 percent of teenagers in South Korea are near-sighted.
The researchers said they could not completely explain the reasons why more and more people are near-sighted, and say it could have many different causes. They did say that looking at computer screens and mobile phones could be a leading cause. Researchers said the sudden rise in myopia may be linked to lifestyle changes resulting from a combination of decreased time outdoors and increased near-work activities. Science journalist Sarah Zhang said, "Spending time outdoors, especially in early childhood, reduces the beginning of myopia." Professor Kovin Naidoo, a member of the report, gave some advice. He said, "You could spend a long time reading computers and screens, but also spend two hours outdoors."
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1.The underlined word “myopia” means _______ in Chinese.
A 痛风
B 远视
C 近视
D 癫痫
解析：选C。词义猜测题。根据文中关键词short-sighted, near-sighted等词可知，故选C。
2.When you got myopia, you can see something _______.
A far away
B nearby
C in the dark
D in the space
解析：选B。细节理解题。根据第一段第四句It is when we have difficulty seeing something that are far away from us.可知，故选B。
3.The people with myopia will increase _______ times from 2000 to 2050.
A five
B six
C seven
D ten
解析：选C。细节理解题。根据第一段第六句It will increase seven times from 2000 to 2050.可知，故选C。
4.Sarah Zhang is _______.
A short-sighted
B a researcher
C from South Korea
D a science journalist
解析：选D。细节理解题。根据第二段倒数第三句Science journalist Sarah Zhang said可知，故选D。
5.What’s the best title for the passage?
A How to prevent myopia.
B How to heal myopia.
C Myopia in South Korea.
D Myopia in the world.
解析：选D。文章标题题。文章围绕世界范围内的近视现象展开说明，故选D。
