Sharks are ... than dolphins. (dangerous)
more dangerous
What's the most difficult lesson for you?
...
Your example: reading books - playing video games
...
Going to the cinema is ... than watching TV. (exciting)
more exciting
Your example: sushi - pizza
...
Harry Potter is ... book of all. (interesting)
the most interesting
Football is ... sport in my country. (popular)
the most popular
Surfing is ... than swimming, (difficult)
more difficult
What's the most interesting lesson for you?
...
Pizza is ... than hot dogs. (delicious)
more delicious
Monday was ... day of all the week. (boring)
the most boring
What's the most boring lesson for you?
...
Emma is ... girl in our class. (beautiful)
the most beautiful
What's the most delicious food for you?
...