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

 

阅读理解

　　We are a non-profit organization(非盈利性组织). We have volunteer(志愿者) jobs for people of all ages. Anyone, from twelve-year-old children to people in their 80s, can become a volunteer.

　　You can help people in many ways. Schools need help taking care of children while their parents are working. Hospitals need volunteers to look after children while their parents see a doctor. Animal lovers can help take care of those dogs and cats without homes. There is something for everyone.

　　“As a volunteer, I don't want to get anything. Seeing the children's happy faces, I am happy, too.” Said Carlos Domingo, an old woman of 62. “I often played computer games in my spare time before. Now I help elder people learn how to use computers.” Said another volunteer at the age of 18.

　　If everyone helps others a bit, we'll have a better world to live in.

　　Interested? Call us on 1-800-555-5756, or visit our website: www. activol. com

1．What kind of people can become volunteers?

[　　]

A．Only teenagers.

B．People from I2 years old to about 80.

C．Only old people.

D．Only students and teachers.

2．________ need volunteers.

[　　]

A．Animals without homes

B．Doctors

C．Non-profit organization

D．Everyone

3．Volunteers want to get ________ when they help others.

[　　]

4．Carlos Domingo does volunteer work with ________.

[　　]

5．This passage is ________.

[　　]

阅读理解

　

The Most Widely Used Language ---- English

　

　　There are more than 3,000 languages in the world today, but only about ten are major (主要) languages of the world. Among them English is the most popular.

　　More than 350 million people speak English as their first language. Major English-speaking countries are Britain, Australia, New Zealand, Canada and the USA. Another 400 million speak it as a second language. No one knows how many people speak English as a foreign language. They usually learn English as a school subject instead of learning it from their parents. Chinese is the only language with more speaks than English. This is because of the large population of China.

　　English is the language for a better understanding between people of the world. It is also the language for business and science. Nearly half of the business deals (交易) in Europe are done in English, and more than half of the science magazines are in English. English is widely used in the world's computer net-work (计算机网络) . And children should begin with English when they learn how to use computers. Through the English language peoples of different countries are able to work together and make things even better.

(1) English is the most popular language in the world because ________ .

[　　]

A．it has the largest number of speakers

B．it is widely used

C．it is an international language

D．it is a language for world use

(2) The world's computer net-work takes English as ________.

[　　]

A．its only language

B．one of the main language

C．a school subject

D．a foreign language

(3) If you want to learn how to use computers, you should ________.

[　　]

A．speak English well first

B．work together with foreigners

C．learn English well

D．make things better

(4) If you know English, you'll be able to ________.

[　　]

A．do everything better than before

B．understand what people from different countries say

C．read nearly all the science magazines in the world

D．read many science magazines in the world