Pages won't open after unexpected shut down
I'd try clearing the saved state files.
From Finder:
- Cmd ⌘ N
- Cmd ⌘ Shift ⇧ G
- Copy/paste
~/Library/Saved Application State
Find the folder com.apple.iWork.Pages.savedState and delete the contents not the folder itself, as it's an alias.
That should give Pages a fresh start.