Ответ:

  1. That is your jacket. Yes, it’s yours.
  2. That is his picture. Yes, it’s his.
  3. This is her dress. Yes, it’s hers.
  4. These are our shoes. Yes, they’re ours.
  5. Those are your bags. Yes, they’re yours.
  6. This is their boat. Yes, it’s theirs.

Ответ: 1) yours; 2) his; 3) hers; 4) ours; 5) yours; 6) theirs.