It is normal to fell angry sometimes.Anger can be either helpful or _.Anger can be a strong motivating force;it may provide you with the _ necessary to try to change things.Consider the case of Clayton,a teenager who _ math and science.Clayton's first reaction to his poor grades might be anger toward his teachers.After thinking about his situation,_,Clayton may realize that he has to change his own _.He may have to give up some after school activities and _ more time studying.Anger can also be a _ emotion.Suppose Clayton continues to _ his anger at his teacher or turns his anger upon himself.He might give up on his schoolwork altogether or become _ or even violent.These reactions would tend to _ the situation of improving it.