______ is worth doing well.
According to the data from Robb’s studies, men produce slightly ______ speech. But no sex difference in the reading task was found.
Love means you care about the ______ of a person, that is, you hope he or she can lead a happy life.
Recently, a new research has suggested the possibility in a popular magazine ______ pleasant smells might reduce pain.
Mr. Smith felt upset for being ______ from the concert he had longed for.
Usually math inspires fear, but Mr. Smith turns that fear into a unique kind of understanding, and, ______, progress and learning.