Ответ:

  1. The new shopping centre is bigger than the old one.
  2. Your headphones were more expensive than mine.
  3. The sale in this shop is fantastic. It's better than the last one.
  4. Can you find some nicer trainers? I don't like them.
  5. The new shop assistant is friendlier than the last one.
  6. Going shopping is more exciting than shopping online.