短文填空。根据短文内容和首字母提示把所缺单词填写在短文中相应的横线上，使句意完整正确。
There is nothing more important to life than the sun. Without the sun all living things on the earth would die.
The sun is a star. There are millions of stars like the sun i (1) the sky. They are as large as the sun and
as hot as the sun. At n (2) you can see many stars, but in the daytime you can o (3) see one
star-the sun. The sun is much n (4) to us than any other star. That's w (5) it looks the biggest
and brightest of all the stars. The distance (距离) of the sun from the earth is as much as 110 million kilometers.
Most of the stars are thousands of light years a (6) from the earth. Do you k (7) the light year?
Nothing in the world travels faster than light. It t (8) 300, 000 kilometers a second (秒). And one light
year is the distance that light travels in one year.
