Напишите 8 вопросов со степенями сравнения прилагательных.

Who are more friendy cats or dogs?
What kind of transport is more dangerous?
What kind of sport is more exciting hockey or fotball?
Which is healthier vegetables or fruits?
What is more expensive diamonds or rubies?
What mount is the highest in the world?
What is the longest river in the world? 
What is heavier silver or gold?