By Christ, but you can't control your expression all in a moment!

She moved round to the far side of the bed, struggling to control her expression, and bent to pick up something from the floor.

He actually bit his lower lip, trying to control his expression.

It was all he could do to control his expression.

She turned from him, not able to control her expression any longer.

She controlled her expression with a visible effort, and said, "Please.

He could have controlled his expression, but he didn't try.

Price had learned to control her facial expression no matter what she was feeling.

Ereven wasn't the only one who could control his expression, after all.

Is made up of one or more genes and the sequences controlling their expression.