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.
【小题1】A computer screen may injure your eyes if __________.

句型转换

1.They are old men．(改为单数形式)

­­_________ ___________  old _________.           

2.He usually takes a bus home．(同义句)

He usually __________ __________  ________  ________ .

3.There are five books on the desk．(划线提问)

________  _________  on the desk ?

4.She does her homework at home every day.（改为否定句）

She ___________ _____________her homework at home every day.

5.Amy likes re reading．（对划线部分提问）

What ____________Amy like_____________?

6.Millie is in Class Two．（对划线部分提问）

_____________ ___________is Millie in?

7.You can’t feed the birds in the park. （改为祈使句）

                 the birds in the park.

8.This is Andy and Millie’s ball. (对画线部分提问)

        ball is this?

Computers can injure (伤害) you. Most other injuries happen suddenly. For example, if you fall over a bike and break your arms, it happens very     . But computer injuries happen slowly. You probably know how to ride a bike safely. Now learn to use a computer safely.

Your eyes      light can injure your eyes,       never sit too close to a computer screen. Your eyes should be       50centimeters（厘米）on the screen.       remember to look away from it. 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. Hundreds of times. If you use a keyboard for a long time,         these three rules: 1）Rest your wrists on some­thing. 2）Keep your elbows（肘）at the same height as the keyboard. 3）Stop sometimes 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 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 every 30 minutes and        your arms, legs and neck.      your computer, but use it safely.

1.A. much quickly      B. faster                 C. slowly              D. quickly

2.A. Too many       B. Too much            C. Much too             D. Many more

3.A. so               B. because      C. but                   D. when

4.A. at last                   B. at most     C. at least         D. less than

5.A. Sometime  B. Some time         C. Some times     D. Sometimes

6.A. can            B. may                       C. must           D. should

7.A. both                B. never      C. all           D. neither

8.A. follow             B. work          C. copy              D. write   

9.A. need               B. exercise              C. walk           D. shake

10.A. Enjoy      B. Watch                C. Protect             D. Keep

A lot of people like pets. I like them ,too. My favorite pet is a pig. I call him Pink Pig. The color of his skin is light pink. Pink is very clever and we keep him in the house. He is clean. He likes water and I often help take a path in a pond behind my house. He enjoys fruit and vegetables. He doesn’t mind whether. they’re good or not. Pink likes walking ,too. I often take him out for a walk. He always follows me ,just like my little friend.

根据短文内容，判断句子正误。正确的在括号内写“T”，错误的写“F”（10分）

1.Pink is dirty.

2.Pink likes to have a bath.

3.The pond is in front of  the house.

4.Pink walks a lot.

5.Pink only eats good fruit and vegetables.