Sentence 1: Tony had a faithful dog. 
 Sentence 3: This made Tony very happy 
 Sentence 4:  One day Tony was not looking when he got off the bus 
 Sentence 5:  As a car passed the bus the faithful dog pulled Tony to safety 
 Option 1: the dog played with other dogs. 
 Option 2: Everyday the dog would wait for Tony to get home from school.