I did not doubt that his questioning implied a serious and important task for me.

There were the children to take care of and educate, a serious task.

"I think we have a serious task in front of us."

Or I might readily have found a more serious task.

I said; for to do so, as I am inclined to think, will be a very serious task.

Even returning to the 1985 level, which was considered normal, would be a serious task.

That, Socrates, is a serious task to impose on a man of my years.

Throughout the project, he showed a rare ability to make serious and difficult tasks a pleasure to accomplish.

Greater continuity is fundamental to building relationships and carrying out a serious task.

This year, we face a very serious task, particularly in our dealings with third countries.