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

【小题1】你的学习取决于你努力的程度。
Your success______　_______  how hard you work at your lessons.
【小题2】他只是为教师而不是为艺术家。
He is only a teacher _____ _______ an artist.
【小题3】要花费1400亿元建设兰新高速铁路
It will______140 billion yuan to_____ Lan zhou-Xinjiang High-speed Railway.
【小题4】我们每个人都感到自豪的是首届中国亚欧博览会将于2011年9月1日在乌鲁木齐举行。
Everyone of us is proud of ourselvesbecause the first China Eurasia Expo will ______ in  Urumqi on September 1^st, 2011.
【小题5】我们确信在中国政府的帮助下新疆发展得比过去更好更快。
We______ that Xinjiang is developing better and faster than before with the help of the centralgovernment

根据汉语完成下面句子。　（共10小题，每小题1分，共15分）。

1.你越努力，你明天就会越好。The _______ you work, The _______you will be tomorrow.

2.我们应该采取措施来解决这个问题。We should ________ ________to solve the problem.

3. 化学制品对环境有害。Chemicals are ________ ________ the environment.

4.他已详细地叙述了昨天他所做的事.  He has________what he did yesterday _____  ________.

5.你昨天应该打电话给我．You ______ ________ ________ call me yesterday.

Alexis Rocha is a 13-year-old boy from California, US. He weighs 147 pounds (67 kg). But six months ago, he weighed more than 202 pounds (91 kg). How did he lose all that weight in only half a year?
“One day, I was surprised to find that I weighed about 200 pounds,” Rocha says. “I thought I had to do something.”
Rocha is from a boxing (拳击) family—his father and two older brothers are professional boxers. So he decided to start boxing. He began with simple exercises, like sit-ups and push-ups (俯卧撑). Then Rocha started jogging(慢跑). “No kid likes running,” he says. “I don’t want to do it, either, but I have no choice but to keep on.”
Months later, Rocha joined a boxing club in his city. He is always the first kid at the club to begin exercising, and the last to leave with sweat (汗水) on his face. Every day he boxes for about three hours.
“Rocha works very hard,” says his coach, Hector Lopez. “It’s surprising to see him lose the pounds so quickly. I’ve never seen anything like this in my 20 years of coaching.”
Rocha is very happy with his weight now. There is a family photo in his room from 18 months ago. “Each time I look at the photo, I laugh at myself. I was so big back then,” Rocha says. “I look 100 times thinner and 1,000 times stronger now.”
【小题1】How much weight did Rocha lose in six months?
A. At least 24 pounds.     B. At least 30 pounds.　　    C. At least 55 pounds.
【小题2】 Rocha said he had no choice but to keep on running because_______.
A. he liked running very much
B. he wanted to be thin and strong
C. he wanted to be a professional boxer
【小题3】What makes Coach Hector Lopez surprised?
A. Rocha lost weight so quickly.
B. Rocha was so fat 18 months ago.
C. Rocha comes from a boxing family.
【小题4】What’s the correct order of the following sentences?
a. He did some sit-ups and push-ups.
b. He lost the pounds quickly.
c. He joined a boxing club.
d. He began running.
f. He boxed for about three hours every day.
A. a-d-c-f-b     B. d-a-f-c-b     C. a-d-f-c-b 
【小题5】The writer mainly wants to tell us _______.
A. Rocha is a hardworking boy
B. it is important to get exercise
C. everything is possible if you work hard