I wonderful if there is any girl or boy who does not like to see a rainbow（彩虹）in the ___1___ It is so beautiful.

　　 A rainbow is not a thing which we can feel with our hands as we can feel a flower. It is only the effect（效果）of light shining on raindrops. The raindrops catch the sunlight and break it up into all the wonderful ___6__ which we see.

　　It is ___7__ a rainbow perhaps because it is made up of raindrops and looks like a bow（弓）.

　　That is ___8___ we can never see a rainbow in a clean sky. We see rainbows ___9____ when there is rain in the air and the sun is shining brightly through the clouds. Every rainbow has many colors in same order（順序）. The first of the top color is always red, next ___10___ orange, then green, and last of all blue. A rainbow is indeed one of the wonders of nature.