Sentence 1: When Mark was in first grade he slipped off the jungle gym at school. 
 Sentence 3: Mark's teacher sent him to the school nurse 
 Sentence 4:  The school nurse could tell his arm was broken and called Mark's mom 
 Sentence 5:  She took him to the doctor to get a bright orange cast 
 Option 1: As he hit the ground, Mark felt a sharp pain his his left ankle. 
 Option 2: As he hit the ground, Mark felt a sharp pain his his left wrist.