第三部分：概括大意与完成句子

　　阅读下面这篇短文，短文后有2项测试，任务：(1)1-4题　要求从所给的4个选项中为段每段选择1个正确的小标题;(2)第5-8题 要求从所给的5个选项中选择4个正确选项，分别完成每个句子。

　　Eye Problems

　　1 . Our eyes are under a great deal of strain these days as computer work, television　viewing, night driving, and even sunshine are making exceptional demands . Sunlight,　especially in the summer, is now regarded as one cause of cataracts(白内障)》

　　2 . The thinning of the ozone (臭氧) layer means more short-wave ultraviolet (UV) rays　(紫外线) are reaching the earth, and these are the biggest risk factor for clouding the lens　of the eye. Ultraviolet rays increase the risk of changes to the cornea (角膜) causing　clouded vision and eventually cataracts. The rays can be shielded only by anti-UV lenses　However, our eyes are not sufficiently protected by fashion sunglasses.

　　3 . “Poor night vision and eye fatigue are noticeably more common, and there has been　a big increase in minor eye complaints in the over-40s,” says Dr . Mireille Bonnet, who more than 100,000 times a day and that everyone should learn to exercise their eye　muscles and allow them to rest .

　　4 . It was traditionally thought that near- or far- sightedness were inherited conditions　and could not be influenced by environmental factors. but new research is challenging　this assumption .

　　5. Recent studies suggest that up to 80 percent of schoolchildren in the United States　and western Europe are nearsighted. Years of focusing on close, two- dimensional work　causes most children to become at least slightly nearsighted by the age of 10, say the　researchers.

　　6 . Problems with night vision, which affect around 25 percent of people, are also on the　increase because of computer use . Using computer screens means the eye must　operate in electromagnetic fields (电磁场) that make it work harder. It is estimated that 25　to 30 percent of people have eye conditions, such as difficulty with night vision, which　result from staring at a screen .

　　23. Paragraph 2 ________ 答案：B

　　24. Paragraph 3 ________ 答案：A

　　25. Paragraph 4 ________ 答案：D

　　26. Paragraph 5 ________ 答案：E

　　A. The development of poor night vision

　　B. The greatest threat to the eyes

　　C. The function of sunglasses

　　D. The reason for children’s nearsightedness

　　E. The effects of computer on the eyes

　　F. The ways to reduce eye complaints

　　27. Sunlight in the summer is believed to be one cause of ______. 答案：B

　　28. We can wear antr-UV glasses to protect ______ 答案：D

　　29. We used to believe that near- or far – sightedness were inherited from ______ 答案：A

　　30. Over 25% of people are estimated to have difficulty with night vision due to ______ 答案：E

　　A. our parents

　　B. clouded vision

　　C. eye muscles

　　D. our eyes

　　E. computer use

　　F. eye move