Twenty years ago serious work began to create a system of national service.

The conference committee will probably not begin serious work until early next year, the Republicans said.

Now, he said, the entire book market is down, whether serious or popular work.

Nor does he consider either one a part of his "serious work."

For serious work, the best place to sit is in the technology center.

But a lot of very serious and important work needs to happen first.

It was time he got down to some serious work.

It's not a bad place, and they do some serious work here.

Clearly there are places in the university where we're going to have to do some serious work to make things better.

It is the time for us to return to serious work.