2. 外语
  3. Children today spend more time stare at computer 【S1】______ and TV screens both at school and at home. Scientific 【S2】______

Children today spend more time stare at computer 【S1】______ and TV screens both at school and at home. Scientific 【S2】______

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问题    Children today spend more time stare at computer 【S1】______
   and TV screens both at school and at home. Scientific 【S2】______
   studies show an epidemic of myopia (also known as
   nearsightedness) has struck children—and it is spreading faster
   in many countries. Doctors warn that sitting too close
   to a computer, especially fixes your eyes at a computer or 【S3】______
   TV screen from close range, increases the risk of myopia.
   The cause of myopia is difficult to explain in simple
   terms. While some say sitting near computers and TV screens
   is one of the reasons, others say children born to nearsighted
   parent/parents are vulnerable. 【S4】______
   Can genes or the environment, or a combination of two 【S5】______
   explain the growing prevalence of myopia across many
   countries? How can parents understand what causes myopia
   and the risks it poses to their children’s eyesight?
   Children suffering from myopia have trouble seeing
   close objects clearly. The eyeball is thought to become 【S6】______
   longer, because of which less effort is needed to see up
   close. Moreover, the elongated eye can no longer focus on 【S7】______
   distant objects.
   Symptoms of myopia are rarely noticed in early 【S8】______
   childhood. Myopic children must hold books very close 【S9】______
   to their face or may not be able to read the writing on the
   blackboard in school. They may squint and complain of
   head and eyestrain. 【S10】______
【S3】
选项
答案fixing
解析 医生警告如果坐得离电脑太近，特别是一直盯着电脑或电视机屏幕，会增加患近视眼的风险。fix这个动作应该参考sitting的形式，两者在句中所起的作用相同，都是做that从句中的主语，因此要用动名词形式，将fixes改为fixing。
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