Ответ:

  1. Jake is very independent.
  2. Jane is very curious.
  3. Jack is very cunning.
  4. Danny is very helpful.
  5. Julia is very musical.
  6. He is very unfriendly.

Ответ: 1) independent; 2) curious; 3) cunning; 4) helpful; 5) musical; 6) unfriendly.