_______16. It is futile to argue with the boss once he has made up his mind.
_______17. One symptom of H-fever is nose-bleeding.
_______18. The post is titled; please straighten it.
_______19. The union's grievance committee met with the school directors to protest the teacher's dismissal.
_______20. A conscientious teacher spends hours preparing lesson plans and computing student's grades.