Sentence 1: Laura's old cat had died when she was little. 
 Sentence 3: Laura's friend at school was moving, and had to give away her cat 
 Sentence 4:  Laura brought a carrier to school, brought the cat home, and hid it 
 Sentence 5:  That night, Laura surprised her mom with a cake and the new cat 
 Given Sentence 2: Laura's mom missed having a cat, and it was her mom's birthday.