Q: Where would you get a pen if you do not have one?
Options:
- briefcase
- desk drawer
- friend's house
- pocket
- sidewalk
A: friend's house
Explain how we arrive at this answer: 
Explanation: One has to borrow a pen if one does not have it. People tend to borrow stuff from their friends. One goes to a friend's house if one wants to borrow a pen.