I wonder if there is any girl or boy who does not like to see a rainbow in the sky. It is beautiful. There is a story, saying that whenever you see a rainbow you should run at once to the place where it touches the ground, and there you would find a pot of gold. Of course it is not true. Neither you could find gold, nor would you ever find its end. No matter how far you run, it always seems far away.
A rainbow is not a thing which we can feel with our hands as we can feel a flower. It is only the effect(结果) of light shining on raindrops. The raindrops catch the sunlight and break it up into all the wonderful colours which we see.
It is called a rainbow perhaps because it is made up of raindrops and looks like a bow(弓).
That is why we can never see a rainbow in a clear sky. We see rainbows only when there is rain in the air and the sun is shining brightly through the clouds. Every rainbow has many colours in the same order. The first or the top colours is always red, next comes orange, then green, and last of all, blue. A rainbow is indeed one of the wonders of nature.
We can not feel _______with our hands.

A．gold	B．a flower
C．a rainbow	D．a raindrop

We can see a rainbow________.

A．when it is raining heavily

B．when it is snowing

C．in a clear sky

D．When it becomes fine shortly after raining.

Which of the follow is NOT right?

A．A rainbow is always far away from us.

B．A rainbow is the effect of light shining on raindrops.

C．A rainbow is created by scientists.

D．A rainbow is one of the wonders of nature.

The first color of a rainbow is always_______.

A．yellow

B．red

C．green

D．blue