Dialogue:  M: What do you think you'll be doing in five years' time, Carrie?  W: I definitely won't be working as a car park attendant. I want to become an opera singer. I hope I'll be living in Milan. What about you, Frank?  M: Unless I pass my exams, I'll probably serve rude customers in the restaurant.  W: Come on. Don't be so sad. Cheer up, Frank.  Question: Why is Frank so sad about his future planning?   - Because he wants to be a singer but he cannot.  - Because he won't be able to live in Milan.  - Because he is afraid that he cannot pass the examination.

Because he is afraid that he cannot pass the examination.