The lower production levels are a _________ of dissatisfaction among the workers, so it’s time to raise their salary.
When the teacher told the boy to sit down, he _____ to her and said she couldn't make him.
People _____ with anyone who is always talking about how wonderful he is.
Margaret liked all her classes, but she liked sewing class _____.
The problem had become _____ in his mind, and he could not decide what to do about it.