The former expression had not appeared in any publication since 1991.

A strange expression appeared on the face of the customs man.

Even if this expression appears between quotes, I did not use it.

Then a sudden expression of enlightenment appeared upon his face.

He touched the upper left square, and the expression appeared there.

A guarded expression mixed with fear appeared on his face.

For the first time an expression appeared on the scarred face of George.

A blank expression appeared on her face, and she didn't move.

An expression of disbelief appeared on his thin, dark face.

An expression which sat oddly on the tall man's face now appeared.