Sentence 1: Andrew made a pizza. 
 Sentence 3: His roommate discovered that the pizza had not been fully cooked 
 Sentence 4:  He began to gag 
 Sentence 5:  Andrew laughed at his roommate's misfortune 
 Option 1: His roommate was very hungry, so he stole a slice. 
 Option 2: He offered his roommate a slice but he declined.