"After 20 years of working with students, we are seeing unprecedented levels of engagement and creativity like we have not seen in 20 years,"

VOA: standard.2009.12.08

Darwin had been working on his theory for over twenty years when he published " On the Origin of Species."

VOA: special.2009.12.01

He was seventy years old and still working as the marshal of Cromwell,Oklahoma.

VOA: special.2010.03.10

During his seventy-two years he was one of America's most hard-working musicians.

VOA: special.2009.08.02

"In the last three years, the people of this country have been working to promote reform, reconstruction,and reconciliation.

VOA: standard.2009.08.14