Sentence 1: I used to love playing pranks on Billy, my older brother. 
 Sentence 3: I put the snake in Billy's bed and waited in his closet 
 Sentence 4:  Billy came in and pulled back the bed sheets 
 Sentence 5:  I laughed when Billy screamed and fell backwards from the snake 
 Given Sentence 2: Ned's doctor said that he should get more exercise.