Question

use，travel，effect，small, it， move,is, if,from,run

  Some of us may know nothing about " black holes.”In fact, they are not real holes like those in the walls or in the ground, but an object in space or outer space with extremely large gravity. 1 gravity is so strong that even light can't escape from the black hole. A black hole is from a collapsed ( i丹塌)super star. When a super star  2  out of its fuel(燃料)，it will collapse. Its gravity remains the same,but in a 3space, the star no longer produces light.

The gravity of a black hole is so huge that all the objects that used to go around the super star continue to  4  around the black hole. However,   5 an object is close to the black hole, it will  6  pulled into the black hole.

  "The huge gravity of a black hole is so terrible！Even if nuclear weapons(原子弹)are

7  to attack a black hole, all the 8could only be a small hole，" said a scientist 9 New York. There are over 10 million black holes in the universe. Some are 10 and othefs are not. They have so huge gravity. Can they affect our earth one day? We don't know.

1.__________ 2.______   3.________

4.______ 5.______   6.________

7.______  8._________ 9.     

10._______

Answer 1

1. Its 2. runs 3. smaller

4. travel 5. if 6. be 7. used

8. effects 9. from 10. moving