选词填空
从下面方框中选择适当的词填入短文中，使短文通顺正确（注意有些词要用适当的形式）
| are only small at still from look use |
There are millions of stars in our sky . If you look （1）______ the sky on a clear night , it is possible to see about 3000 stars . They （2）______ small , but they are really very big hot balls of burning gas . Some of them are huge , but others are much （3）_______，like our planet Earth . The biggest stars are very bright , but they （4）______ live for a short time . Every day new stars （5）______ born and old stars die.
All the stars are very far away . The light （6）______ the nearest star takes more than four years to reach Earth.
Hundreds of years ago , people （7）______ stars , like the North star , to know which direction （方向）to travel in . Today you can （8）_____ see that star.
1. at 2. look 3. smaller 4. only 5. are
6. from 7. used 8. still