You can’t see any object unless light from that object gets into your eyes．Some of the things you see give off light of their own。The sun，the stars，a lighted lamp are the examples that can be seen by their own light．But most of the things you see are not giving off light of their own．They are just reflecting(反射)light that falls on them from the sun or some other luminous bodies．The moon，for example，doesn’t give off any light of its own．It is not 1uminous．You see it because sunlight falls on it and some of the sunlight reflects on the earth．So moonlight is only second—hand sunlight．
When you look at a book，it sends some of the light which fails on it to your eyes，and you see the book．If light could be kept out from where you’re so that there would be no light from the book to reflect．Then you couldn’t see the book even with your eyes wide open．Light travels so fast that the time in which it travels from the book you’re reading to your eyes is as short as if there were no time at time．Light reaches us from the moon，which is about 380，000 kilometres away，in only a little more than a second．
【小题1】You can see the book because________．

A．your eyes are close to it	B．it reflects some of the light
C．it has light of its own	D．it is big enough to be seen

【小题2】The Chinese meaning of the world“luminous”is close to_______．

A．闪光的

B．看不见的

C．发光的

D．明亮的

【小题3】________has light of its own．

A．The moon

B．The earth

C．The sun

D．The satellite of Dong Fong Hong

【小题4】Light travels about_________kilometers per second．

A．300，000

B．100，000

C．400，000

D．190，000

【小题5】Which of the following is TRUE?

A．All the things you can see give off light．

B．Light from the book is much faster than that from the moon．

C．The moment you open your eyes，the light from the book travels to your eyes．

D．Light travels so fast that there is no time for you to read．

You hurry into the kitchen，open the refrigerator and suddenly you forget why you open it．“What am I looking for？”You ask yourself．“What am I doing here？”Don't worry．You are not losing your mind．We have all had this kind of thing．If you think about something very quickly，it goes into your short-term memory and it goes right back out in just a few seconds．You have not moved things from short-term to long-term memory，so you won't be able to remember it later on．
What can you do to help get back your missing short-term memory？You may go back to where you were．So，for example，if you were sitting in a chair listening to the music in the living room，just go back into the living room．This will help you remember，and when you are back in the living room，you will suddenly think，“Oh，yes，I was thirsty and I wanted something cold to drink．That is why I went to the fridge．”If，sometimes，you can't go back to where you were before，just try tracing your steps back in your mind．Think back to things you did before，and this may help you．
【小题1】We sometimes forget why we open the refrigerator, probably because___________.        

A．We lose our mind.	B．We are not thirsty.
C．We think about something too quickly.	D．we won’t be able to remember things.

【小题2】What can you do to help get back the missing short-term memory?

A．Stay where you are.	B．Make yourself thirsty.
C．Listen to some music.	D．Try tracing your steps back in your mind

【小题3】Which of the following is TRUE according to the passage?

A．Only a few of us will have such experiences,

B．People always forget why they hurry into the kitchen.

C．It doesn’t matter if you can’t remember why you do a certain thing at times.

D．Have something cold to drink can help you to remember the things.

【小题4】Which is the best title?

A．Lose your memory	B．What’s wrong with you?
C．Learn to forget	D．Just open the refrigerator

You can’t see any object unless light from that object gets into your eyes．Some of the things you see give off light of their own。The sun，the stars，a lighted lamp are the examples that can be seen by their own light．But most of the things you see are not giving off light of their own．They are just reflecting(反射)light that falls on them from the sun or some other luminous bodies．The moon，for example，doesn’t give off any light of its own．It is not 1uminous．You see it because sunlight falls on it and some of the sunlight reflects on the earth．So moonlight is only second—hand sunlight．
When you look at a book，it sends some of the light which fails on it to your eyes，and you see the book．If light could be kept out from where you’re so that there would be no light from the book to reflect．Then you couldn’t see the book even with your eyes wide open．Light travels so fast that the time in which it travels from the book you’re reading to your eyes is as short as if there were no time at time．Light reaches us from the moon，which is about 380，000 kilometres away，in only a little more than a second．
【小题1】You can see the book because________．

A．your eyes are close to it	B．it reflects some of the light
C．it has light of its own	D．it is big enough to be seen

【小题2】The Chinese meaning of the world“luminous”is close to_______．

A．闪光的

B．看不见的

C．发光的

D．明亮的

【小题3】________has light of its own．

A．The moon

B．The earth

C．The sun

D．The satellite of Dong Fong Hong

【小题4】Light travels about_________kilometers per second．

A．300，000

B．100，000

C．400，000

D．190，000

【小题5】Which of the following is TRUE?

A．All the things you can see give off light．

B．Light from the book is much faster than that from the moon．

C．The moment you open your eyes，the light from the book travels to your eyes．

D．Light travels so fast that there is no time for you to read．

You hurry into the kitchen，open the refrigerator and suddenly you forget why you open it．“What am I looking for？”You ask yourself．“What am I doing here？”Don't worry．You are not losing your mind．We have all had this kind of thing．If you think about something very quickly，it goes into your short-term memory and it goes right back out in just a few seconds．You have not moved things from short-term to long-term memory，so you won't be able to remember it later on．

What can you do to help get back your missing short-term memory？You may go back to where you were．So，for example，if you were sitting in a chair listening to the music in the living room，just go back into the living room．This will help you remember，and when you are back in the living room，you will suddenly think，“Oh，yes，I was thirsty and I wanted something cold to drink．That is why I went to the fridge．”If，sometimes，you can't go back to where you were before，just try tracing your steps back in your mind．Think back to things you did before，and this may help you．

1.We sometimes forget why we open the refrigerator, probably because___________.        

A．We lose our mind.                      B．We are not thirsty.

C．We think about something too quickly.       D．we won’t be able to remember things.

2.What can you do to help get back the missing short-term memory?

A．Stay where you are.                     B．Make yourself thirsty.

C．Listen to some music.                    D．Try tracing your steps back in your mind

3.Which of the following is TRUE according to the passage?

A．Only a few of us will have such experiences,

B．People always forget why they hurry into the kitchen.

C．It doesn’t matter if you can’t remember why you do a certain thing at times.

D．Have something cold to drink can help you to remember the things.

4.Which is the best title?

A．Lose your memory                      B．What’s wrong with you?

C．Learn to forget                         D．Just open the refrigerator

 

You can’t see any object unless light from that object gets into your eyes．Some of the things you see give off light of their own。The sun，the stars，a lighted lamp are the examples that can be seen by their own light．But most of the things you see are not giving off light of their own．They are just reflecting(反射)light that falls on them from the sun or some other luminous bodies．The moon，for example，doesn’t give off any light of its own．It is not 1uminous．You see it because sunlight falls on it and some of the sunlight reflects on the earth．So moonlight is only second—hand sunlight．

    When you look at a book，it sends some of the light which fails on it to your eyes，and you see the book．If light could be kept out from where you’re so that there would be no light from the book to reflect．Then you couldn’t see the book even with your eyes wide open．Light travels so fast that the time in which it travels from the book you’re reading to your eyes is as short as if there were no time at time．Light reaches us from the moon，which is about 380，000 kilometres away，in only a little more than a second．

1.You can see the book because________．

     A．your eyes are close to it       B．it reflects some of the light

     C．it has light of its own         D．it is big enough to be seen

2.The Chinese meaning of the world“luminous”is close to_______．

     A．闪光的       B．看不见的      C．发光的       D．明亮的

3.________has light of its own．

A．The moon   B．The earth   C．The sun    D．The satellite of Dong Fong Hong

4.Light travels about_________kilometers per second．

    A．300，000      B．100，000      C．400，000        D．190，000

5.Which of the following is TRUE?

    A．All the things you can see give off light．

    B．Light from the book is much faster than that from the moon．

    C．The moment you open your eyes，the light from the book travels to your eyes．

    D．Light travels so fast that there is no time for you to read．