1.   His face had grown serious, and he kept his eyes on the road.

2.   This financial crisis is growing more serious by the hour.

3.   The financial crisis was growing more serious by the hour.

4.   Then once more the deep blue eyes grew serious.

5.   Then, growing serious, she sighed.

6.   Arafat has also grown more serious about Israeli security needs in the past weeks and continued to arrest and try Muslim militant opponents.

7.   As negotiations grew serious, Ackerman took to the air, flying to Denver to meet with Nacchio.

8.   As that deal faded, talks with Access Beyond began and quickly grew serious.

9.   At first, the others thought he was joking, but then the discussion grew more serious.

10.   A phone conversation at that time with Allen elicited interest, and when rumors about the Celtics started swirling a few weeks ago, talks grew more serious.