1.   Forecasters along the East Coast are concerned on Sunday about a strengthening low pressure area while a Pacific storm weakens as it approaches the West Coast of North America.

2.   Ms. Hernandez said she grew concerned on Sunday morning when she was unable to reach her brother by phone.

3.   They did not seem concerned on Wednesday that Dole might succeed in muddying that distinction.

4.   My family and friends feel worried and concerned on the eve of the operation.

5.   Despite the calm on the streets, Serei Kosal remained concerned on Sunday.