4．Many of us don't pay attention to the importance of eye care．It's said that if you take care of your body，then you can be healthy．That is why our eyes should be given a lot of care．Natural eye care should be put in a number one place．
There are several causes leading to poor eyesight like not enough food，gene（基因） and aging（年龄增长）．Televisions，computers and reading are also the causes of having poor eyesight．
If you happen to work in front of the computer，it is best to take a rest every once in a while．Something dirty can cause redness and they will make you feel uncomfortable．It is bad for your eyes，too．If this happens，the best way is to clean your eyes by using cold water．You must also try your best to protect your eyes from harmful thing．For example，sunglasses are not just fashion but they can also serve as a great way to protect your eyesight from UV rays．
Eating healthy foods will do good to your eyesight．Remember that vitamins（维生素） A、C and E are good for eyes．Try to eat food groups that have these vitamins．And you should do eye exercises because exercise protects your eyesight，too．If a person exercises regularly（规律地） and eats the right kind of food，his eyes will stay in good condition for a long time．
All above are natural ways of eye care that help us keep healthy eyes．Being happy all the time can be helpful to a person's eyesight，too．In a word，eye care is very important，no matter how old a person is．
51．A is the most important way to protect our eyes．
A．Natural eye care B．Taking medicine
C．Seeing the doctor D．Being happy all the time
52．All the following causes can lead to bad eyesight exceptB．
A．age B．height C．reading D．computer
53．What should you do if you have to work in front of the computer？D
A．Eat healthy foods． B．Clean the eyes by using cold water．
C．Wear a pair of sunglasses． D．Have a rest after working for a while．
54．What do the under words"UV rays"mean？C
A．沙土 B．闪电 C．紫外线 D．超声波
55．Which is the best title of the passage？A
A．Ways of Eye Care B．Ways of Eye Exercises
C．Way of Being be Happy D．Way of Being Healthy．
分析 我们中的许多人不注意眼部护理的重要性．据说如果你照顾好你的身体，你可以很健康．这就是为什么我们的眼睛应该得到很多的照顾．自然的眼部护理是一个很重要的方面．有几个原因导致视力不好，基因和年龄增长，电视，电脑和阅读也是视力不佳的原因．
如果你在电脑前工作，最好每隔一段时间休息一次．肮脏的东西会导致红肿，会让你感觉不舒服，会对你的眼睛有害．如果发生这种情况，最好的方法是用冷水清洗你的眼睛．您还必须尽力保护你的眼睛，比如，太阳镜不仅仅是时尚，而且他们也能作为一个伟大的方式阻挡紫外线来保护你的视力．
健康饮食有利于你的视力，维生素A，C，E对眼睛有好处，尽量吃含这些维生素的食物．你也应该做眼保健操，因为锻炼可以保护你的视力．有规律的锻炼，吃正确的食物，眼睛会保持完好很长一段时间．
以上是自然的眼部护理的方法，帮助我们保持健康的眼睛．快乐也可以保护一个人的视力．总之，不管一个人多大年纪，眼部护理是非常重要的．
解答 1．细节理解题．根据"natural eye care should be put in a number one place"可知，natural eye care是最重要的保护眼睛的方式．所以本题选A．
2．综合理解题．阅读全文可知年龄、读书、打电脑，都可能引起视力的变化，体重与视力无关．故不是引起视力变坏的原因．所以本题选B．
3．常识理解题．根据it is best to take a break every once in a while．可知，在电脑前工作一段时间后，我们应休息一会． 所以本题选D．
4．词义理解题．Ray是射线的意思．通过阅读我们可知，太阳镜可以阻挡是"紫外线"．故UV rays．所以本题选C．
5．主旨理解题．通过阅读全文可知本文主要讲述保护眼睛的方法．所以本题选A．
故填A，B，D，C，A．
点评 本题中的题目在文中都不能完全找到合适的句型，都需要我们进行通读全文，加以总结和合理的推断，如3、4、5小题．阅读时还应该注意文章的细节部分，如1、2小题．
