摘要:参加 12.in the first prize

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  Computers can injure 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 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 at least 50 centimeters from the screen. Remember 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 (肘部) 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(前臂), wrists, hands and the upper(上部) part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and necks.

 Enjoy your computer, but use it safely.

1.A computer screen may injure your eyes if __________.

  A. you sit 60 centimeters away    B. you remember to look away

  C. your eyes are too close to it    D. the window is on your left or your right 

2. Hand and wrist injuries are caused when you _________.

  A. get plenty of exercise         B. move in the same way again and again

  C. rest your wrists on something   D. keep your elbows as high as the keyboard

3.Your eyes and hands will be safe if __________.

  A. you work near a window         B. you often take a rest from working

  C. you use a keyboard for a long time  D. the window is behind you

4.It is good for your back and neck if you sit __________.

  A. in the right way                           B. for many hours

  C. with the screen below your eyes       D. with your back leaning forward

5. What would be the best title for the passage?

  A. How to protect your eyes            B. How to protect your hands and wrists

  C. How to use a computer safely       D. How to protect your back

 

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As everyone knows, there are many  16  of transportation in the world, like bicycles, buses, ships, trains and  17  .

If you are in big  18 like Shanghai or Beijing, maybe you get to school   19  a subway or you have to  20  to school because you live in a mountain village. Here I am just trying to say something about 21  .

Ten years 22 , bicycles were very 23 in most villages.  24  family had one or two of bicycles. Children got to school by bicycle;  25  rode bicycles to go shopping. Then motorcycles (摩托车)   26  to become popular. People no longer rode bicycles because motorcycles ran   27  faster.  But now, in some countries,bicycles are highly suggested

  28  the main means of transportation. They think buses, cars and motorcycles pollute(污染) the air but bicycles   29  . So, to live a low-carbon life,   30  a bike is a good way.

1.

A.kind

B.kinds

C.mean

D.way

 

2.

A.other

B.others

C.the other

D.another

 

3.

A.cities

B.countries

C.villages

D.countryside

 

4.

A.on

B.by

C.in

D.of

 

5.

A.on foot

B.walk

C.walks

D.runs

 

6.

A.bicycles

B.motorcycles

C.buses

D.cars

 

7.

A.later

B.before

C.ago

D.after

 

8.

A.cheap

B.important

C.expensive

D.popular

 

9.

A.All

B.Both

C.Every

D.Most

 

10.

A.women

B.boy

C.woman

D.girl

 

11.

A.begin

B.began

C.begun

D.start

 

12.

A.more

B.much

C.less

D.most

 

13.

A.for

B.in

C.at

D.as

 

14.

A.not

B.don’t

C.doesn’t

D.didn’t

 

15.

A.riding

B.rides

C.rode

D.ride

 

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