Ответ:

  1. Cookery programmes are more interesting than documentaries.
  2. Adverts can sometimes be better than the programmes.
  3. Reality shows are worse than chat shows.
  4. Watching films at the cinema is more exciting than watching them on TV.
  5. Ben Stiller is funnier than Will Smith.

Сравнительная степень: длинные прилагательные образуют сравнительную степень с more, а good, bad имеют особые формы better, worse.