Sentence 1: Cindy was reading through her email when she spotted something. 
 Sentence 3: She didn't have anyone to go with her to the pizza shop 
 Sentence 4:  Cindy decided it didn't matter and went to get pizza by herself 
 Sentence 5:  She ended up having a very good time by herself 
 Option 1: It was her birthday and a local motorcycle shop had sent a gift card. 
 Option 2: It was her birthday and a local pizza shop had sent a gift card.