You cannot 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 examples that can be ssen by their own light. Such things are luminous. Most of the things you see are not giving off light of their own. They are simply reflecting light that falls on them from the sun or some other luminous bodies. Then moon , for example , does not give off any light of its own. It is non-luminous. You see it because sunlight falls on it and some of it reflects in your direction. So moonlight is only secondhand sunlight.

When you look at a book, it sends your eyes some of the light that falls on it, and you see the book. If light could be kept out from where you are so that there would be no light for the book to reflect, then you could not see the book even with your eyes wide open.

Light travels so fast that the time in which it travels from the book you are reading to your eyes is so short as if it took no time at all. Light reaches us form the moon , which is about 380,000 kilometers away, in only a little more than a second.

You can see the book because___________.

   A. your eyes are close to it .   B. it reflects light

   C. it has light of its own      D. your eyes can get to it

The word “ reflects”  means____________.

   A. throws back              B. takes back

   C. gives off                 D. sends out

    ___________ have light of their won.

   A. the sun and the moon     B. The stars and the earth

   C. The sun and the stars     D. The moon and the earth

You cannot 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 examples that can be ssen by their own light. Such things are luminous. Most of the things you see are not giving off light of their own. They are simply reflecting light that falls on them from the sun or some other luminous bodies. Then moon , for example , does not give off any light of its own. It is non-luminous. You see it because sunlight falls on it and some of it reflects in your direction. So moonlight is only secondhand sunlight.

When you look at a book, it sends your eyes some of the light that falls on it, and you see the book. If light could be kept out from where you are so that there would be no light for the book to reflect, then you could not see the book even with your eyes wide open.

Light travels so fast that the time in which it travels from the book you are reading to your eyes is so short as if it took no time at all. Light reaches us form the moon , which is about 380,000 kilometers away, in only a little more than a second.

1.You can see the book because___________.

2.The word “ reflects”  means____________.

3.    ___________ have light of their won.

完形填空

Different things usually stand for different feelings. Red, for example, is the color of fire, heat, blood and life. People say red is an exciting and active color. They associate（使发生联系） red with a strong feeling like __21__. Red is used for signs of __22__ , such as STOP signs and fire engines. Orange is the bright, warm color of __23__ in autumn. People say orange is a __24__   color. They associate orange with happiness. Yellow is the color of __25__. People say it is a cheerful color. They associate yellow too, with happiness. Green is the cool color of grass in __26__. People say it is a refreshing color. In general, people __27__ two groups of colors: warm colors and cool colors. The warm colors are red, orange and __28__. Where there are warm color and a lot of light, people usually want to be __29__. Those who like to be with __30 _ like red. The cool colors are __31_  and blue. Where are these colors, people are usually worried. Some scientists say that time seems to __32 _ more slowly in a room with warm colors. They suggest that a warm color is a good __33_  for a living room or a __34_ . People who are having a rest or are eating do not want time to pass quickly. __35__ colors are better for some offices if the people working there want time to pass quickly.

21. A. sadness               B. anger         C. administration    D. smile

22. A. roads                B. ways        C. danger              D. places

23. A. land                    B. leaves        C. grass                D. mountains

24. A. lively                B. dark          C. noisy                D. frightening

25. A. moonlight         B. light          C. sunlight            D. stars

26. A. summer             B. spring        C. autumn             D. winter

27. A. speak               B. say            C. talk about         D. tell

28. A. green                  B. yellow       C. white                      D. gray

29. A. calm                 B. sleepy        C. active               D. helpful

30. A. the other            B. another      C. other one          D. others

31. A. black                  B. green         C. golden              D. yellow

32. A. go round            B. go by               C. go off              D. go along

33. A. one                   B. way          C. fact                  D. matter

34. A. factory           B. classroom C. restaurant         D. hospital

35. A. Different          B. Cool          C. Warm               D. All

阅读理解

　　You have seen the moon many times. Does it look large or small? Does it look near or far away?

　　When you see the moon from the earth, the moon looks small. The moon is really very large, but not as large as the earth. It is much larger than the largest mountain on the earth.

　　Why does the moon look small when you see it from the earth?

　　The moon is very far away from the earth.

　　Things that are far away from you look smaller than things that are close.

　　Which looks smaller, the moon or the tree?

　　The moon looks smaller, even though it is really much larger than a tree. It looks smaller because it is far away from you and the tree is close to you.

　　What is moonlight?

　　You can see the sun and the stars in the sky. They give off light. The moon does not give off any light of its own. How then can you see the moon at night?

　　Light from the sun shines on the moon. Some of this light reaches the earth from the moon. The moon reflects (反射) sunlight, which now can be called moonlight.

　　How is light reflected? You can see how light is reflected if you hold a mirror in the sun. The mirror will reflect some sunlight.

　　The moon is something like a mirror. It reflects the light of the sun.

　　If you see light shining on the ball, half of the ball is in the light and the other half is dark.

　　The sun shines all the time. However, it shines on only half of the moon at a time. Like the earth, half of the moon is in sunlight. The other half is dark.

　　What part of the moon can you see? The only part of the moon you can see is the part that is in sunlight.

1．The moon is really very large, ________.

[　　]

A．but as large as the largest mountain on the earth

B．but not as large as the sun

C．but not as small as the earth

D．but as large as the earth

2．The moonlight is ________.

[　　]

A．the sun gives off light

B．the moon gives off light of its own

C．the sun and stars give off light

D．some of this light that comes from the sun and stars in the sky and reaches the earth from the moon

3．Like the earth, half of the moon is in sunlight. The other half is dark because ________.

[　　]

A．the sun shines all the time

B．we can see a part of the moon only

C．the only part of the moon we can see in the part that is in sunlight

4．The moon looks smaller than large mountains on the earth because ________.

[　　]

A．the moon is not a real object

B．large mountains are bigger than the moon

C．large mountains are closer than the moon

D．the sun shines on the moon

5．Which of the following is not true?

[　　]

A．The moon reflects sunlight all the time.

B．The sun shines all the time.

C．When we are not in sunlight, it is at night.

D．We can see the dark half of the moon.