Bob was cutting a branch（树枝） off a tree in his garden. While he was sawing（锯）, another man passed in the street. He stopped and said, “ Excuse me, but if you continue (继续)to saw（锯） that branch like that, you will fall down with it.” He said this because Bob was sitting on the branch and cutting it at a place between himself and the trunk（树干） of the tree.

Bob said nothing. He thought, “ This is some foolish（愚笨的） person who has no work to do and goes about telling other people what to do and what not to do.”

The man continued on his way. Of course, after a few minutes. The branch fell and Bob fell with it.

“My God!” he cried. “That man knows the future!” and he ran after him to ask how long he was going to live. But the man had gone.

1.One day Bob was cutting a branch_______a tree in his garden.

A．on

B．in

C．at

D．off

2.While Bob was sawing, another man_______.

A．told him to stop working	B．told him he would fall down
C．would borrow something from him	D．would help him saw that branch

3.After hearing the man’s words, Bob thought that________.

A．that was a foolish person.	B．that was a wise person
C．that was a proud person	D．that fellow cheated him

4.What happened to Bob after a few minutes?

A. The branch fell.             B. Bob fell down to the ground.

C. Bob was hurt himself. 　　         D. Both A and B.

5.This story is about ________.

A．a foolish man

B．a wise man

C．cutting a tree

D．that we need to take good advice

 

                                 

  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

 

选词填空

take　of　working　instructions　felt　It

My father bought a new cell phone for me last week.It can 　1　 photos and short videos.I like it very much.One day，I wanted to use it to take a photo 　2　 my father.But it was not 　3　.I didn’t know why.My father suggested that I should read the 　4　first.And I did as he said.　5　explains how the phone works.I took a lot of beautiful photos and I 　6　 so happy.

 

Bob was cutting a branch（树枝） off a tree in his garden. While he was sawing（锯）, another man passed in the street. He stopped and said, “ Excuse me, but if you continue (继续)to saw（锯） that branch like that, you will fall down with it.” He said this because Bob was sitting on the branch and cutting it at a place between himself and the trunk（树干） of the tree.
Bob said nothing. He thought, “ This is some foolish（愚笨的） person who has no work to do and goes about telling other people what to do and what not to do.”
The man continued on his way. Of course, after a few minutes. The branch fell and Bob fell with it.
“My God!” he cried. “That man knows the future!” and he ran after him to ask how long he was going to live. But the man had gone.
【小题1】One day Bob was cutting a branch_______a tree in his garden.

A．on

B．in

C．at

D．off

【小题2】While Bob was sawing, another man_______.

A．told him to stop working	B．told him he would fall down
C．would borrow something from him	D．would help him saw that branch

【小题3】After hearing the man’s words, Bob thought that________.

A．that was a foolish person.	B．that was a wise person
C．that was a proud person	D．that fellow cheated him

【小题4】What happened to Bob after a few minutes?
A. The branch fell.             B. Bob fell down to the ground.
C. Bob was hurt himself. 　　          D. Both A and B.
【小题5】This story is about ________.

A．a foolish man

B．a wise man

C．cutting a tree

D．that we need to take good advice

Bob was cutting a branch（树枝） off a tree in his garden. While he was sawing（锯）, another man passed in the street. He stopped and said, “ Excuse me, but if you continue (继续)to saw（锯） that branch like that, you will fall down with it.” He said this because Bob was sitting on the branch and cutting it at a place between himself and the trunk（树干） of the tree.
Bob said nothing. He thought, “ This is some foolish（愚笨的） person who has no work to do and goes about telling other people what to do and what not to do.”
The man continued on his way. Of course, after a few minutes. The branch fell and Bob fell with it.
“My God!” he cried. “That man knows the future!” and he ran after him to ask how long he was going to live. But the man had gone.
【小题1】One day Bob was cutting a branch_______a tree in his garden.

A．on

B．in

C．at

D．off

【小题2】While Bob was sawing, another man_______.

A．told him to stop working	B．told him he would fall down
C．would borrow something from him	D．would help him saw that branch

【小题3】After hearing the man’s words, Bob thought that________.

A．that was a foolish person.	B．that was a wise person
C．that was a proud person	D．that fellow cheated him

【小题4】What happened to Bob after a few minutes?
A. The branch fell.             B. Bob fell down to the ground.
C. Bob was hurt himself. 　　         D. Both A and B.
【小题5】This story is about ________.

A．a foolish man

B．a wise man

C．cutting a tree

D．that we need to take good advice