Everyone has his problems to worry about.

Son: I try to be a good son, but no matter how hard I try, my parents never seem to be satisfied. They think I should eat healthier food, I should wear nicer clothes, and I should get better grades. And according to them, my hair should be shorter, my room should be neater, and my friends should be more polite when they come to visit. You know it isn’t easy to be a teenager.

Parents: We try to be good parents, but no matter how we try, our children never seem to be satisfied. They think we should wear more fashionable clothes, we should buy a faster car, and we should listen to more interesting music. And according to them, we should be more sympathetic when they talk about their problems, we should be more friendly when their friends come to visit, and we should be more understanding when they come late from a Saturday night date. You know it isn’t easy being parents.

根据材料内容，判断正（T）误（F）。

1.There are four people in the boy’s family.

2.The boy’s parents want him to have shorter hair and make his room cleaner.

3.According to the boy, it’s hard to have polite friends.

4.The parents try their best to be good.

5.According to the passage, children always want their parents to eat much healthier food.

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 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, 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 exercise your arms, legs and necks.

Enjoy your computer, but use it safely.

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

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

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

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

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

                                 
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 __________.