Ответ:

A train slower than bus.

This text is the most difficult of all.

Park Street is longer than Market street.

This jacket is smaller than that one.

What is the most important thing in life?

A crocodile is more dangerous than a water snake.

Helen is the most beautiful girl in our class.

Greg felt worse yesterday than the day before.

Объяснение:

Before 'than' we use comparlative.

After 'the' we use superlative.