Cat again

Take your time to see if you can read each line aloud without mistake.
Most folks can't do it.

"This is this Cat.
This is is Cat.
This is how Cat.
This is to Cat.
This is keep Cat.
This is a Cat.
This is retard Cat.
This is busy Cat.
This is for Cat.
This is forty Cat.
This is seconds Cat."


Congratulations.
Now read the third word of each line.