The sky_____looks light blue.But if you go to the _______of the highest mountain,
where________is less air_____you and the sun to scatter the sunlight,the sky would be dark blue.And if you ride in a spaceship high ____the earth,_________there is no air at all,the sky would be_____dark that it would be black.
Sometimes the sky doesn't look blue,_________sunrise and sunset,the light_____the sun sometimes is scattered in such a way that you see red,orange,and______colours in the sky.