Ответ:

  1. It’s the best hospital I have ever visited.
  2. He’s the happiest child I have ever met.
  3. It’s the most interesting book I have ever read.
  4. It’s the ugliest house he has ever seen.
  5. It’s the most boring party we have ever attended.
  6. It’s the most expensive bike he has ever bought.
  7. It’s the worst cake I have ever made.
  8. It’s the most difficult word I have ever learned.
  9. It’s the most wonderful song I have ever heard.
  10. It’s the oldest town she has ever visited.

Примечание: в списке слов на фотографии нет глагола, подходящего к предложению 5; по смыслу нужен глагол attend.