Sentence 1: Sally signed up for her first 5K. 
 Sentence 3: She was determined to beat her personal record 
 Sentence 4:  When race day came, she was ready 
 Sentence 5:  Sally beat her record and finished in a great time 
 Option 1: She had been training for a few months but will never beat her personal record. 
 Option 2: She had been training for a few months.