When a student's grades hit bottom it is time to hit the books.

VOA: special.2009.09.20

And,these are occurring at a time when the global economic crisis is making it more difficult to maintain good health, especially in the developing world.

VOA: standard.2009.05.18

The violence represents an effort to undermine Iraqi authorities, to undermine them at a time when it is widely understood that U.S.forces are beginning a departure.

VOA: standard.2009.09.10

"When it is all said and done, I think it is time for a 'do over'. We need to start this budget process all over again.

VOA: standard.2009.03.24

"This is at a time when we are working to relaunch negotiations and we believe that these actions make it more difficult for our efforts to succeed.

VOA: standard.2009.11.17