topic 10

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Across
  1. 2. working by itself without direct human control
  2. 8. to go or move something forward，or to develop or improve something
  3. 9. to say in advance that something will happen
  4. 10. having intelligence
Down
  1. 1. to promise that something will happen or exist
  2. 3. suitable for your purposes and needs and causing the least difficulty
  3. 4. to add the most recent information to something
  4. 5. to work or operate
  5. 6. an important discovery or event that helps to improve a situation or provide an answer to a problem
  6. 7. to make something easy to do or understand