Computers can injure(傷害) you. Most other injuries happen suddenly. For example, if you    a bike and break your arms, it happens very    . But computer injuries slowly.You probably know how to ride a bike safely. Now learn to     a computer safely.
Your eyes
   light can injure your eyes,     never sit too close to a computer screen. Your eyes should be    50 centimeters（厘米）    the screen（平幕），  Remember to look away from it sometimes. This gives your eyes a rest.
When you use a computer, the window    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     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     times. If you use a keyboard for a long time,      these three rules: 1) Rest your wrists on something. 2) Keep your elbows at the same height as the keyboard. 3) Stop something 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 should sit with your back straight. The top part of the screen should all 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      30 minutes and      your arms, legs and necks.
   your computer, but use it safely.

【小題1】
A．fall overB．fall downC．fall offD．fall onto
【小題2】
A．carefullyB．luckilyC．slowlyD．quickly
【小題3】
A．fixB．runC．rideD．drive
【小題4】
A．Too manyB．Too muchC．Much tooD．Many more
【小題5】
A．soB．becauseC．butD．when
【小題6】
A．a(chǎn)t lastB．a(chǎn)t mostC．a(chǎn)t leastD．less than
【小題7】
A．toB．fromC．onD．a(chǎn)way
【小題8】
A．sometimeB．some timeC．some timesD．sometimes
【小題9】
A．canB．mayC．mustD．should
【小題10】
A．bothB．neverC．a(chǎn)llD．none
【小題11】
A．hundred of B．hundredsC．hundreds ofD．two hundreds
【小題12】
A．follow B．workC．copy(復(fù)制)D．write
【小題13】
A．oneB．everyC．bothD．once
【小題14】
A．needB．exerciseC．moveD．climb
【小題15】
A．EnjoyB．UseC．Protect (保護(hù))D．Keep


【小題1】C
【小題2】D
【小題3】C
【小題4】B
【小題5】A
【小題6】C
【小題7】B
【小題8】D
【小題9】D
【小題10】A
【小題11】C
【小題12】A
【小題13】B
【小題14】B
【小題15】A

解析試題分析：這篇短文告訴我們?nèi)绾握_使用電腦；電腦對(duì)你的傷害是慢慢地；要注意從不離電腦屏幕太近，你的眼睛應(yīng)該離屏幕至少50厘米；當(dāng)你用電腦時(shí)，窗戶應(yīng)該在你的左邊或右邊；如果你長時(shí)間坐，每30分鐘站起來并鍛煉你的手臂等內(nèi)容。
【小題1】考查動(dòng)詞短語及語境的理解。句意：如果你從自行車上跌落下來并折斷胳膊。A. fall over跌倒，B. fall down 掉下，fall off從…….跌落。據(jù)句意，故選C。
【小題2】考查副詞及語境的理解。句意：它發(fā)生的很快。A. carefully認(rèn)真地，    B. luckily 幸運(yùn)地，C. slowly   慢慢地，D. quickly很快地。據(jù)But computer injuries happen slowly.可知答案，故選D。
【小題3】考查動(dòng)詞及語境的理解。句意：你可能知道如何安全騎自行車。A. fix修理，B. run跑，C. ride騎，D. drive開車。據(jù)句意，故選C。
【小題4】考查固定短語及語境的理解。句意：太多的光會(huì)傷害到你的眼睛。light當(dāng)“光”講時(shí)，是不可數(shù)名詞。too much太多， 修飾不可數(shù)名詞。故選B。
【小題5】考查連詞及語境的理解。句意：所以從不離電腦屏幕太近。A. so因此，B. because因?yàn)椋?nbsp;  C. but但是，D. when當(dāng)……的時(shí)候。據(jù)句意，故選A。
【小題6】考查固定短語及語境的理解。句意：你的眼睛應(yīng)該離屏幕至少50厘米。A. at last 最后，B. at most至多，C. at least至少，D. less than小于。據(jù)句意，故選C。
【小題7】考查介詞及語境的理解。句意：你的眼睛應(yīng)該離屏幕至少50厘米。A. to向，B. from離……，C. on在……上，D. away離開。據(jù)句意，故選B。
【小題8】考查副詞及語境的理解。句意：有時(shí)要記住離開屏幕看看。A. sometime某個(gè)時(shí)候，B. some time一些時(shí)間，C. some times幾次，D. sometimes有時(shí)。據(jù)句意，故選D。
【小題9】考查情態(tài)動(dòng)詞及語境的理解。句意：當(dāng)你用電腦時(shí)，窗戶應(yīng)該在你的左邊或右邊。A. can能， B. may可以，C. must必須，D. should應(yīng)該，據(jù)句意，故選D。
【小題10】考查代詞及語境的理解。句意：如果窗戶在你的前面，太陽和屏幕將都照射進(jìn)你的眼睛。both兩者都，因?yàn)樘柡推聊皇莾烧�，�?jù)句意，故選A。
【小題11】考查固定詞組及語境的理解。句意：因?yàn)槭趾褪滞笠酝环绞揭苿?dòng)數(shù)百次。hundreds of 是固定詞組，數(shù)以百計(jì)的。據(jù)句意，故選C。
【小題12】考查動(dòng)詞及語境的理解。句意：如果你長時(shí)間用鍵盤，遵守這三條規(guī)則。A. follow遵守，       B. work工作，C. copy復(fù)制，D. write寫。據(jù)句意，故選A。
【小題13】考查形容詞及語境的理解。句意：如果你坐很長時(shí)間，每30分鐘站起來。A. one一，B. every 每，C. both都，D. once一次。據(jù)句意，故選B。
【小題14】考查動(dòng)詞及語境的理解。句意：如果你長時(shí)間坐，每30分鐘站起來并鍛煉你的手臂。A. need需要，B. exercise鍛煉，C. move移動(dòng)，D. climb爬。故選B。
【小題15】考查動(dòng)詞及語境的理解。句意：享受你的電腦，但要安全地使用它。A. Enjoy 享受，B. Use用，C. Protect   保護(hù)，D. Keep保持。據(jù)句意，故選A。
考點(diǎn)：科普類短文。

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