About ten men in every hundred have the trouble of colorblindness in some way. Women are luckier, only about five in every hundred are affected in this matter. Perhaps, after all, it is safer to be driven by a woman.

There are different shapes of color blindness. For example, a man may be able to see deep red. He may think that red, orange and yellow are all shades of green. Sometimes a person can not tell the difference between blue and green. Only a few unlucky men may see everything in shades of green-a strange world indeed.

Colour blindness in human beings is a strange thing to say clearly. In only one eye there are millions of very small things called “cones^①”. These help us to see in a bright light and to tell difference between colours. There are also millions of “rods^②”，but these are used for seeing when it is nearly dark. They show us shapes but no colours. Some insects have favourite colours. Mosquitoes^③ like blue but do not like yellow. A red light will not attract insects, but a blue light will. Human beings also have favourite colours. Yet we are lucky. With the help of the cones in our eyes we can see many beautiful colours by day, and with the help of the rods we can see shapes at night. One day we may even learn more about the invisible^④ colours around us.

生词注释：①cone n.锥形物　②rods n.棒　③mosquitoe n.蚊子　

　　　　　④invisible adj.看不见的

1.“colour blindness”means       in Chinese.

       A.色盲                        B.颜料                    C.盲目                   D.瞎

2.Why do some people say it is safer to be driven by women?

       A.Women are better at driving than men.

       B.Women are more careful.

       C.There are fewer colour blind women.

       D.Women are friendly to people.

3.With the help of the “cones”, we can      .

       A.tell different shapes   B.kill insects

       C.see in a weak light     D.tell orange from yellow

4.We can attract and kill mosquitoes by using a       light.

       A.red                          B.yellow                 C.blue                    D.green

5.Which of the following sentences about the colour blindness is TRUE?

       A.None of them can see deep red.

       B.Not all of them have the same problem in recognizing(识别)colour.

       C.None of them can tell the difference between blue and green.

       D.All of them see everything in shades of green.

What is the sky？ Where is it？ How bright is it？ What lies above it？ These questions are difficult to answer, aren’t they？

　　Is the sky blue？ The sky has no color. We know that there is air around the world. When planes fly, they need air to lift their wings. Planes can’t fly very high because the air gets thinner when they go up higher. If we go up about 1,200 kilometers from the earth, we’ll find no air there.

　　When we talk about the sky, we usually mean the atmosphere around the earth. It is like a very thick “cover” over the earth and keeps it warm. Without the “cover”, the earth would be a very cold place and nothing could live on it.

　　Looking up above us, you will see the blue sky with white clouds. It is usually light blue, but the sky would be dark blue if you go to the top of the highest mountains. And you will see fewer clouds between you and the sun.

　　And if you sit in a spaceship high above the earth, there is no air at all. The sky would be so dark that its color would be black.

　　Sometimes the sky doesn’t look blue. When the sun rises and falls, you will see red, orange, and other colors in the sky. These are the most beautiful moments of the day.

　　Now you may understand that we see colors because the air scatters (散射) the sunlight. Light travels through the air. Without air, there would be no light and no colors.

1.Planes can’t fly very high because ____________.

A．there is air around the world

B．the air gets thinner when they go up higher

C．it’s warmer in the sky

D．the air gets thicker when they go up higher

2.We can see colors of the sky because ____________.

A．the sun rises and falls every day

B．the sky has lots of colors

C．the air scatters the sunlight

D．the sunlight has many colors

3.Which of the following is TRUE？

A．There is little air without light and colors in the sky.

B．The sky will look red, orange and other colors at noon.

C．The sky has only one color when the sun rises and falls.

D．The sky is dark blue if you go to the top of the highest mountains.

　　Hello, boys and girls. My name is Kangkang. I’m from Tianjin. I’m No.1 middle school.
　　My mother works in No.1 middle school. She teaches Chinese. My father is a doctor in a hospital. They both work hard.
　　On Sunday my mother and I often do some shopping. My mother likes shopping a lot. We will go shopping this Sunday afternoon. My mother says she will buy me a red coat. But I don’t like red. I want a yellow one. My mother says yes to me. I am happy.
　　My father doesn’t like shopping at all. He likes animals best. He often takes me to the zoo. My favorite animal is the panda. I think panda are very cute. This Sunday morning my father will go to the zoo with me.
I love my parents very much. They love me, too. I have a happy family.
【小题1】Kangkang`s mother is a ____________.
A. doctor B. nurse C. teacher
【小题2】What color does Kangkang like?
A. red B. yellow C. black
【小题3】______ likes animals best.
A. Kangkang`s mother B. Kangkang C. Kangkang`s father
【小题4】______ is Kangkang`s favorite animal?
A. the monkey B. the panda C. the elephant
【小题5】There are (有) ______ people in Kangkang`s family.
A. two B. three C. four