Sentence 1: Mark had a leaking pipe under his kitchen sink. 
 Sentence 3: Mark finally cleaned up and told his landlord about the leak 
 Sentence 4:  A plumber came over and Mark was glad to finally have it fixed 
 Sentence 5:  But a week later when Mark did dishes the leak came back even worse 
 Option 1: He fixed it himself because his apartment was a mess. 
 Option 2: But he never called his landlord because his apartment was a mess.