Her question was so difficult that I could hardly make any ____ of it at all.　 

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

My neighbor is very kind. I’ll never forget the ______ she’s done for me.

Today, housework has been made much easier by electrical _____.

A sharp _________in production wouldn’t have been seen but for the advanced techniques.