You mustn't 　　　　　　　　　　　　________ too much.

[　　]

A．eating 　　　B．eat 　　　C．to eat 　　　D．ate

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

  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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　　Dear Roni,

　　Italy is wonderful. We started in Rome two weeks ago, drove to Florence last week and now we're on our way to Venice. Three weeks just isn't enough.

　　The country near Florence is so beautiful－hills, olive trees. And red roofs(屋顶) of the houses look so nice far away.

　　I am afraid I am getting bigger－the food here is so delicious!

Love,

Akemi

　　Roni Lebaver

　　222 Main St. Languna

　　Beach, CA 92651

　　U. S. A.

　　Hi Roni,

　　I can't believe(相信) you went to school here in Honolulu! Why did you leave?

　　I spend each morning on the beach(海滩) and in the water. The sand is so soft and the beaches seem so long. The water is just the right temperature.

　　One afternoon, I left the beach to walk in mountains near Honolulu. I enjoyed myself very much there.

　　How I miss you!

Mari

　　Roni Lebaver

　　222 Main St. Languna

　　Beach, CA 92651

　　U. S. A.

　　Dear Roni,

　　Maybe I'm strange but I love the desert(沙漠)!

　　Last week, our group spent four days in the desert. At times, it felt like the moon.

　　I always thought deserts were all the same! They are not. Some parts look like mountains; others are really different.

　　And when we find something green－－a few plam trees, a little water, we feel good and great.

　　See you in September,

Kim

　　Roni Lebaver

　　222 Main St. Languna

　　Beach, CA 92651

　　U. S. A.

1．Who seems to have eaten too much?

[　　]

2．Who went to school in Honolulu?

[　　]

3．Who spent four days on the moon?

[　　]

4．Where does Roni live?

[　　]

5．Which of the sentences is true?

[　　]

A．Akemi arrived in Rome two weeks ago.

B．Mari spends every morning and afternoon on the beach.

C．Deserts always look the same.

D．Mari had a good time in Honolulu.