What's missing?

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Across
  1. 2. 9.I think you should apologize_____your behaviour.
  2. 3. 6.Last month they_______sightseeing.
  3. 5. 11.She has learnt English_____8 years.
  4. 6. 10.We have a lot____common.
  5. 7. 2.I don't get_____well with my brother.
  6. 8. 4.Maths is more difficult_______Art.
Down
  1. 1. 5.How________going to the theatre next week?
  2. 4. 12.He isn't old_________to drive a car.
  3. 6. 1.What are you interested_____?
  4. 7. 7.She's really keen____painting.
  5. 8. 8.This dog is similar_____mine.
  6. 9. 3.My mum isn't as tall_____my dad.