sentence: The professional gardener made sure to use the right tools. He left the shovel home but brought the rake because the 
complete: rake   was essential.

sentence: Jerry was making pancakes for breakfast but realized he had eggs but he didn’t have milk. It was unnecessary to go to the store for the 
complete: eggs .

sentence: The doctor found a lump on Elena while Erin received a clean bill of health. 
complete:
Elena now has to undergo further testing.