Как поменяются слова с скобках?

.Our (civilize)_________ is not the only life form in the universe.

2.Some (science)______believe that UFOs are real and try to prove it.

3.Ufologists all over the world have become very (act)________.

1 civilization

2 scientists

3 active

добявляются суффиксы. 1civilization

2scientists

3active

вроде так