Opposites.

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Across
  1. 2. Very big.
  2. 3. Not dirty.
  3. 6. It's good to sit on.
  4. 7. You don't need the doctor.
  5. 9. Very small.
  6. 10. You need the doctor.
  7. 11. Don't use this, you need to wash it first.
Down
  1. 1. You can't eat anymore.
  2. 2. You have lots of energy.
  3. 4. I want to smile.
  4. 5. It's hard to lift this.
  5. 7. You want to eat.
  6. 8. You need sleep.
  7. 10. I want to cry,