Sentence 1: Jill had a really short temper. 
 Sentence 3: Jill screamed at her boss for complaining about her work 
 Sentence 4:  Jill was warned that she would be fired if she acted up again 
 Sentence 5:  Jill was able to get help through anger management classes 
 Option 1: But she always kept it in check at work, and they never knew about her temper. 
 Option 2: She was feeling frustrated at work today.