Sentence 1: My friend is a used bookseller. 
 Sentence 3: The person in charge sternly told me there was no cherry picking 
 Sentence 4:  I cherry picked behind her back 
 Sentence 5:  My friend made $100 from the sale 
 Option 1: He inherited a shop from his dad. 
 Option 2: In 2004, i helped him pick up books he bought from a library.