As it was, and despite the gravity of the situation, his expression almost betrayed her.

Joseph looked up and smiled, but his expression betrayed no sign of real pleasure.

I should like to say the expression of Adelman's face betrayed something, but it did not change at all.

He turned his face out to the far shore, to ensure no expression betrayed him.

Had they known it, I am sure that their facial expressions would have betrayed the fact.

The general's expression, for the moment struck dumb, betrayed the truth of this.

Stark looked hard at them, but the boys' expressions betrayed nothing.

Gina looked at me curiously; the expression on my face must have betrayed something.

His expression betrayed only mild interest in the outcome of current events.

The secretary realized that he had almost let his expression betray him.