Ответ:

1. easy - easier - the easiest.

2.  popular - less popular - the least popular - more popular - the most popular.

3.  slow - slower - the slowest.

4.  terrible -  more terrible - most terrible.

5.  nice - nicer  - nicest.

6.  good - better - (the) best.

7. fantastic - more fantastic - most fantastic.

Объяснение:

Как-то так..