As the quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks. 

The teacher suggested we do the exercises with great ________ though they were easy.

There seemed to be no human beings in that village, and the only ______ of life was a boat tied to a tree.

I haven’t seen Sara since she was a little girl, and she has changed beyond ____.

 “Theory is something, but practice is ___” said he.