In about 1560 he entered upon the work with which his name is associated.

I went away, and tried to concentrate upon my work for the next few days.

There seems to be a force dependency upon the work.

The technique used in the current project is based upon our previous work.

Meanwhile, they have led others to follow up and build upon her work.

Then his eyes fell upon the only unfinished work in the room.

He was too intent upon the work that lay ahead.

He lay on his bed reflecting upon the day's work.

By accident my mother had stumbled upon her life's work.

I have seen how you look upon your work.