Sentence 1: Heather is at work and she is hungry. 
 Sentence 3: Because she is at work she needs to wait until her shift ends 
 Sentence 4:  She leaves work right around dinner time and drives to the restaurant 
 Sentence 5:  She walks in, sits down, and finally orders her Chinese food to eat 
 Option 1: She knows she does not have time to stop and get lunch. 
 Option 2: She decided that she has a craving and wants Chinese food.