用括号内所给单词的适当形式填空，
（1）All those foreign____ (thief) have been caught.
（2） Is Australia the____ (three) largest island country in the world?
（3）Look, our dog Eddie is lying____ (comfort) on the grass.
（4）There are a lot of differences between John and____ (I)
（5）Our____ (know) of the universe is growing all the time.
