She sometimes works on one piece for days at a time.

A peace plan on a piece of paper means nothing.

Your father was on a piece of work for us.

He had been working on an important piece of research.

How could one put a price on such a piece of history?

The right hand wrote new words on a piece of paper.

He wrote on a piece of paper and then put the phone down.

I wrote some things down on a piece of paper.

Never before had he spent more than about $20,000 on a single piece of art for himself.

He was writing something down on a piece of paper.