Sentence 1: Nate had just bought a new watch. 
 Sentence 3: He was wearing it on the Subway one day 
 Sentence 4:  A stranger ran up and snatched it away 
 Sentence 5:  He was crushed by the loss 
 Option 1: He saved up for it for just a week. 
 Option 2: He saved up a long time for it.