He grew solemn again, his gaze still fixed on the tree.

Suddenly Sooty's face lost its smile and grew very solemn.

Calvin started to scoff at this idea, but then grew solemn.

As she goes on to tell the story, she grows more solemn.

He stared at me, his face grew strange and solemn.

But then, as he began to think about what could have been, he grew solemn.

They grew solemn when one man discovered a police officer's wallet.

She smiled back, and then her expression grew solemn.

I watched his face grow solemn, and very unlike my Galen.

Her face grew solemn and Dan cursed himself for breaking the mood they had created.