The boy had a pleasant, open expression, but there was something terribly wrong with him.

His round baby face always wore a pleasant, open expression.

Pa had a pleasant expression on his face, and it didn't change.

There was nothing wrong with her face that a pleasant expression wouldn't help.

As for Clay, he was now watching the doctor, his expression pleasant.

He smiled and forced a pleasant expression on his face.

He did not say so, but just waited, a pleasant expression on his face.

Her pleasant expression did not change, except in the eyes.

I tried to find a more pleasant expression, but my face could not seem to recall how to form one.

The young man was about eighteen, she thought, and he had a pleasant, open expression.