Sentence 1: Henry wanted a cell phone for Christmas, nothing else. 
 Sentence 3: It was too big to be a phone 
 Sentence 4:  But when he opened it, there was a phone inside 
 Sentence 5:  His parents had used a big box so he couldn't guess what was inside 
 Option 1: On Christmas morning there was only an envelope left to open. 
 Option 2: On Christmas morning there was only one box left to open.