Eye Facts

    There are many commonly held beliefs about eyesight that are not proven facts. For example, some people believe that wearing glasses too soon weakens the eyes. But there is no evidence to show that the structure（結(jié)構(gòu)）of eyes is changed by wearing glasses at young age. Wearing the wrong glasses, however, can prove harmful. Studies show that for adults there is no danger, but children can develop loss of sight if they have glasses unsuitable for their eyes.

    We have all heard some of the common myths about how eyesight gets bad. Most people believe that reading in weak light causes poor eyesight, but that is untrue. Too little light makes the eyes work harder, so they do get tired and strained. Eyestrain also results from reading a lot, reading in bed, and watching too much television. However, although eyestrain may cause some pain or headaches, it does not damage eyesight in the long term.

    Another myth about eyes is that they can be replaced, or transplanted from one person to another. There are close to one million nerve fibers（神經(jīng)纖維）that connect the eyeball to the brain; as of yet, it is impossible to connect them all in a new person. Only certain parts of the eye can be replaced. But if we keep clearing up the myths and learning more about the eyes, someday a full transplant may be possible!

1. This passage is mostly about __________.

 A. different types of eye problems                   B. myths about eyesight

C. beliefs of eye doctors                                D. eye transplants

2. One cause of eyestrain mentioned in the passage is __________.

 A. wearing glasses too long                            B. suffering from pain or headaches

C. reading in poor light                                 D. reading before going to bed

3. From the passage we can conclude that __________.

A. doctors are still learning things about eyesight

B. wearing wrong glasses is less harmful to adults

C. eye transplants have been performed successfully

D. people should not wear glasses at young age

歐洲繪畫藝術(shù)受人們生活方式和信仰的影響，而中國(guó)不同，長(zhǎng)期以來(lái)一直遵循著同一種生活方式。(unlike)  

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西方世術(shù)風(fēng)格已經(jīng)變革過(guò)多次，而中國(guó)藝術(shù)的風(fēng)格是不經(jīng)常變化的.(The style of)  

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______I’d have told you.

A. If I would have known it                       B. If I had have known it

C. Had I known it                                     D. should I know it

I ____come yesterday, but I couldn’t.

A. was to have            B. must                  C. ought                    D. have to

--Do you think the thief entered through the garage door?

--No, if he had, I don’t believe ____broken the living room window.

A. would he have         B. he had                  C. he would have      D. he has

--Did you hand in your application for a league member?

--Not yet. If I _____to see my father, I would have.

A. didn’t go                 B. haven’t gone         C. wouldn’t have gone         D. hadn’t gone

If I _____out of my ink, I would have finished writing the paper.

A. didn’t run              B. shouldn’t run        C. haven’t run             D. hadn’t run

Why didn’t you tell him the truth?  If I _____you, I would have.

A. were                      B. had been            C. am                        D. would be

-- Did you catch the plane?

--No. if I had hurried, I ______.

A. would                  B. would have               C. could           D. did