— Are you a teacher? — No, but I ____. I worked in a middle school for three years.
I understand ______ preparation that staff must put in under pressure to meet the deadline.
We should always keep in mind that ______ decisions often lead to bitter regrets.
The scientist has made quite a few discoveries, ______ of great importance to the whole world.
What was the critic's ______ to the novel?
She will have to find somewhere else to work, for she can't ______ this loud noise any longer.