Sentence 1: Morgan took the trash out one day. 
 Sentence 3: She twisted her ankle very badly when she fell 
 Sentence 4:  She went to the doctor, and discovered it was sprained 
 Sentence 5:  It took several weeks before Morgan's ankle was healed 
 Option 1: Her dog had dug holes in the yard and she accidentally stepped in one. 
 Option 2: She walked on the pavement outside.