Computers can injure(傷害)you. Most other injuries happen suddenly．For example，if you fall off a bike and break your arms, it happens very quickly. But computer injuries happen slowly．
You probably know how to ride a bike safely. Now learn to use a computer safely．

Your eyes 
Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be more than 50 centimeters from the screen. Don’t forget to look away from it sometimes. This gives your eyes a rest．
When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on(反射)the screen. If the window is in front of you，the sun and the screen will both shine into your eyes．
Your hands and wrists(手腕)
Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules: 1) Rest your wrists on something.
2) Keep your elbows(肘)as high as the keyboard.
3) Stop sometimes and exercise your hands, wrists and fingers in a different way．
Your back
Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you shouldn’t bend your back when you sit. The top part of the screen should be in front of your eyes. Your forearms, wrists, hands and the upper part of your legs should all be parallel(平行)to the floor. If you are sitting for a long time, get up every half an hour and exercise your arms, legs and neck．
Enjoy your computer, but use it safely．
                 Title:  How to use a computer safely
Different
小題1: of your body
Causes of the injuries
Some 小題2: of keeping you away from computer injuries
 
Your eyes
◆Too much light can injure your eyes
◆Don’t sit too close to a computer screen．
◆Your eyes should be  小題3:         50 centimeters from the screen．
◆ 小題4: to look away from the screen sometimes．
 
Your    小題5:    and wrists
◆You  小題6:  them in the same way hundreds of times.
◆You use a keyboard for a long time.
◆小題7: your wrists on something.
◆Keep your elbows at the same       小題8: as the keyboard．
◆Exercise your hands, wrists and fingers in different ways．
 
Your back
◆You sit for many hours   小題9:  a computer．
◆ You sit in the wrong way.
◆You should keep your back             小題10:when you sit．
◆Get up every half an hour if you are sitting for a long time.

小題1:parts
小題2:ways
小題3:over
小題4:Remember
小題5:hands
小題6:move
小題7:Rest 
小題8:height
小題9:before
小題10:straight 

試題分析：這篇短文主要介紹了大部分的傷害是突然的，但是電腦對人體的傷害是緩慢的。作者就如何安全的使用電腦給出了一些建議。
小題1:根據(jù)短文描述可知電腦對人的身體的許多部位有傷害及表格歸納，故填parts
小題2:根據(jù)表格下方的內(nèi)容可知是遠(yuǎn)離電腦傷害的方法，故填ways
小題3:根據(jù)短文Your eyes should be more than 50 centimeters from the screen.可知眼睛要遠(yuǎn)離屏幕50厘米以上，故填over
小題4:根據(jù)Don’t forget to look away from it sometimes. 可知記得要時而不看電腦，故填Remember
小題5:根據(jù)短文描述可知電腦對你的手和肘會有傷害，故填hands
小題6:根據(jù)Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times描述，可知你用相同的方式移動數(shù)百次。故填 move
小題7:根據(jù)短文Rest your wrists on something.描述，故填 Rest 
小題8:根據(jù)Keep your elbows(肘)as high as the keyboard. 描述，故填height
小題9:根據(jù)Some people sit for many hours in front of a computer.描述可知有一些人在電腦前坐好幾個小時，故填before
小題10:根據(jù)So you shouldn’t bend your back when you sit 可知你不應(yīng)該在坐著時彎曲背部，即要保持背部是直的，故填straight 
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Rules to Keep Healthy
Eat different food
You can get小題1:       your body needs from different food.
Drink water often
It’s best to drink 小題2:   when you are really thirsty.
Listen to your body
You should notice when to 小題3:       . Don’t eat too much.
Limit screen time
You should spend no 小題4:   than two hours a day on the screen.
Be active
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