When we can see well, we do not think about our eyes often. It is only when we c

题型：不详难度：来源：

When we can see well, we do not think about our eyes often. It is only when we can not see perfectly that we come to see how important our eyes are.
People who are nearsighted can only see things that are very close to their eyes. Many people who do a lot of close work, such as writing and reading, become nearsighted. Then they have to wear glasses in order to see distant things clearly.
People who are farsighted face just the opposite problem. They can see things that are far away, but they have difficulty reading a book unless they hold it at arm’s length. If they want to do much reading, they must get glasses too.
Other people do not see clearly because their eyes are not exactly the right shape. This, too, can be corrected by glasses. Some people’s eyes become cloudy because of cataracts. Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.
When night falls, colors become fainter to the eyes and finally disappear. After your eyes have grown used to the dark, you can see better if you use the side of your eyes rather than the centers. Sometimes, after dark, you see a small thing to one side of you, which seems to disappear if you turn your head in its direction. This is because when you turn your head, you are looking at the thing too directly. Men on guard duty sometimes think they see something moving to one side of them. When they turn to look straight at it, they can not see it any more, and they believe they were mistaken. However, this mistake happens because the center of the eye, which is very sensitive in daylight, is not as sensitive as the sides of the eye after dark.
小题1:We don’t know that our eyes are of great importance until ________.

A．we think about our eyes

B．we cannot see clearly

C．we wear glasses

D．we have to do much reading

小题2:According to the passage, a ________ is more likely to be nearsighted.

A．tailor

B．doctor

C．guard

D．painter

小题3:People who are farsighted ________ .

A．cannot do a lot of close work without glasses

B．can only see things that are very close to their eyes

C．have difficulty reading a book if they hold it at arm’s length

D．have the same problem as the nearsighted people

小题4:To see a small thing at night, it is better to look ________ .

A．with wide open eyes

B．with half shut or narrowed eyes

C．straight at it

D．in a slightly different direction

答案

小题1:B
小题2:A                 
小题3:A                         
小题4:D                                          

解析

  
试题分析：本文讲述了人的眼睛。当人的眼睛没有毛病的时候，人们几乎忘记他的重要性。但是使用眼睛不当，会得近视眼和远视眼。近视眼只能看清近处的东西，看不清远处的东西。而远视眼只能看清远处的东西而看不清近处的东西。 
小题1:细节理解题。句意：我们知道什么时候才意识到眼睛的重要性。根据：It is only when we can not see perfectly that we come to see how important our eyes are.只有当我们不能很好看清楚东西的时候，我们才会意识到眼睛的重要性。故选B。
小题2:细节理解题。句意；根据文章，哪种人更有可能近视？根据：Many people who do a lot of close work, such as writing and reading, become nearsighted.很多做写作和读书这样近距离工作的人会变得近视。故A裁缝B医生C门卫D画家故选A，裁缝需要近距离工作，使用眼睛。                 
小题3:细节理解题。句意：远视的人会怎样。根据：People who are farsighted .....they have difficulty reading a book unless they hold it at arm’s length远视的人远视的人读书有困难，除非他们把书放在一臂远。远视者看不清近处的东西，故选A 。                        
小题4:细节理解题。句意；为了看清黑夜中细小的东西，最好如何看。根据：After your eyes have grown used to the dark, you can see better if you use the side of your eyes rather than the centers.在你逐渐适应黑夜之后，如果你用侧面看而不是用 眼中间看，效果会更好。故选D 换个小的角度会看的更清楚。