Let's say you're in a department store trying on a new pair of pants.
Why hadn't I thought to wear my good pair of pants!
No one ever wore anything I'd call a pair of pants.
"The first thing I need is a pair of pants!"
Then he pulled on a pair of pants and left the room.
I lost a pair of pants about two weeks ago.
"Happen to know anyone around here who makes a good pair of pants?"
You just might not want to wear your best pair of pants.
He sat down and pulled out a fresh pair of pants.
One day, however, Harry finally gets his first pair of long pants.