There are _____ in the sky at night when the weather is fine.

A. million stars            B. million of stars

C. millions of stars        D. millions of star

There are _____ in the sky at night when the weather is fine.

A. million stars　　　　　　

B. million of stars

C. millions of stars　　　　

D. millions of star

There are ______ in the sky.

[    ]

　　A. millions of stars   B. million of star

　　C. million of stars    D. millions stars

　　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. In the sky there are thousands of stars like the sun. They are as large as the sun and as hot as the sun. At night you can see many stars, but in the day-time you can only see one star－the sun.

　　The sun is much nearer to us than any other star. That is why it looks the biggest and brightest of all the stars. The distance of the sun from the earth is as much as 150 million kilometres. Most of the stars are thousands of light years away from the earth.

　　Do you know the light year? Nothing in the world travels faster than light. It travels 300000 kilometres a second. And one light year is the distance that light travels in one year.

1．Without the sun, there would be no living things ________.

[　　]

2．The stars are ________the sun.

[　　]

3．Light travels ________ in the world.

[　　]

4．From the passage we know light travels ________ kilometres a minute.

[　　]