2. 自考
  3. Problems Caused by Using Computers Long hours at the screen can cause【C1】________ (ache) eyes, 【C2】________ (blur) vision an

Problems Caused by Using Computers Long hours at the screen can cause【C1】________ (ache) eyes, 【C2】________ (blur) vision an

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问题                                                 Problems Caused by Using Computers
    Long hours at the screen can cause【C1】________ (ache) eyes, 【C2】________ (blur) vision and headaches, experts say. In fact, eyestrain surpasses even wrist pain as the top physical【C3】________ (complain) among heavy computer users. When peering into the computer screen, the eye’ s focusing muscle is at constant tension. Like any muscle, it feels sore when【C4】________ (overload) . And when someone spends a lot of time looking at something close, the eye muscle can get【C5】________ (stick) on the near-focus setting and have difficulty relaxing, leaving the person【C6】________ (temporary) nearsighted, a condition called accommodative spasm (痉挛) that can last seconds or hours. The letters on the screen are not as clearly【C7】________ (define) as on a printed page. Take a magnifying glass to your monitor and you’ll see the letters, each made up of pinpoint sources of light, have no sharp edges. But those liquid crystal display (LC. D. monitors, like those found on laptop computers, are【C8】________ (easy) on the eyes because they display sharper images. And studies have shown that when people are working on a computer, their rate of【C9】________ (blink) goes down by two-thirds, which can result in dry, stinging eyes. This is especially a problem for contact-lenses【C10】________ (wear).
【C2】
选项
答案blurred
解析 本句空白处放在名词vision前提示可填入形容词修饰该名词，提示词动词blur需变形填入空白处，名词vision和动词blur属被动关系。因此，将提示词动词blur的过去分词形式blurred填入空白处符合语境，值得注意的是，将动词blur改成过去分词时注意应双写尾字母r再加上-ed。
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