George ate with the complete concentration of a boy who was still growing.

On occasion he still fell into the frenzy of complete concentration.

It was hard going near the top, enough to demand The Shadow's complete concentration.

Brian had listened with complete concentration, taking in every word, analyzing and understanding.

Nothing worthwhile was ever accomplished without complete concentration, he had learned.

He regarded the package with complete concentration, not moving, his hands folded.

It was in fact a complete concentration on the matter at hand.

He went on laying paint upon the canvas with complete concentration.

She looked at him, lips smiling, eyes locked on his with complete concentration.

It is like a dream, where running takes complete concentration.