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Feifei, an 11-year-old boy from Xuzhou, Jiangsu Province, suffered from a sudden serious eye disease which has almost led to blindness. It was caused by excessive(过度的) eye tiredness during the winter vacation, during which he played computer games for a continuous 10 days and nights.

Many youngsters in China nowadays are increasingly crazy about computer games and other electronic products, and can’t help themselves. This is followed by a series of health problems, with the most typical case—nearsightedness.

According to the latest research report released by the World Health Organization (WHO), the nearsightedness rate among Chinese youngsters ranks first in the world—70 percent of high school and college students. The rate is nearly 40 percent in primary school students, while it is only 10 percent for their peers in the United States.

The WHO research report says that the number of nearsighted people in China has reached 600 million, nearly half of the country’s total population. Experts think the increasing nearsightedness rate in China has something to do with the unhealthy lifestyles and learning styles which parents put on their children.

On one hand, to achieve high scores in exams, children spend too much time indoors studying and have not enough time outside in the sunlight. On the other hand, a growing number of high-tech products, such as smart phones and tablet PCs, make children focus their eyes and attention on screens for a long time, resulting in excessive eye tiredness.

Experts suggest youngsters keep a proper balance between study and rest so as to protect their eyesight, and parents should play a relevant(相应的) active role in the process.

1.What does the underlined word “It” refer to in Paragraph 1?

A Eye tiredness.

B A sudden serious eye disease.

C A computer game.

D Blindness.

解析：选B。词意指代题。此处it指代的是上一句中的a sudden serious eye disease，故选B。

2.Being addicted to playing with electronic devices may bring harms to __________.

A eye

B brain

C hands

D arms

解析：选A。A 推理判断题。根据第二段的This is followed by a series of health problems, with the most typical case—nearsightedness.可知沉迷于电脑游戏会导致一系列健康问题，其中最典型的就是近视，故选A。

3.What can we learn from Paragraphs 3 and 4?

A There are more more nearsighted students in the US.

B 70 percent of Chinese primary students are nearsighted.

C More than half of Chinese population are nearsighted.

D Experts think parents are partly to blame for children’s nearsightedness.

解析：选B。D 推理判断题。根据第三段的“...while it is only 10 percent for their peers in the United States”可推出美国青少年的近视率要比中国的低，A项错误；根据第三段中的“70 percent of high school and college students. The rate is nearly 40 percent in primary school students”可知B项错误；根据第四段的“...nearly half of the country’s total population...”可知C项错误；根据第四段的最后一句可知，专家认为孩子近视与父母施与孩子不健康的生活和学习方式有一定关系，D项正确。故选D。

4.What will be probably discussed in the following paragraph?

A The importance of protecting eyesight.

B Youngsters’ bad behavior leading to nearsightedness.

C The relationship between youngsters and their parents.

D Parents’ role in helping youngsters protect their eyesight.

解析：选D。D 细节理解题。本文最后一段提到父母在这一过程中应该起积极作用，那么接下来这段应该会是阐述父母应该发挥的作用，故选D。