It is necessary to explain your theory _____, otherwise the audience won't make sense of what you are trying to get across.
The agent promised to keep the family members fully ______ of any developments.
It was unusual that such close neighbors ______ not know one another.
It’s always hard to remember a name when one doesn’t have a face to go with ______.
Sometimes, ______ a patient a get-well card is better than visiting him.
The report aims to explain how these conclusions ______.