2.
а. It's a long way
б. This longer path
в. It's the longest way
3.
а.Her work is very important
б.His work is more important
в.My work is the most important
4.
а.It's a bad song
б.This is even more bad song
в.This is the worst song
5.
а.He's a good engineer
б.He's a better engineer
в.He is the best engineer
6.
а.He brought her a beautiful flower
б.He brought her a more beautiful flower
в.He brought her the most beautiful chest
7
а.He told us about the happy man
б.He told us of a happier person
в.He told us about the happy man