A: Hello，John! Where are you going?    
B: Hi，Anna! I’m going to Beijing. I want to see my uncle.
A: What does your uncle do in Beijing?    
B: He is a bank clerk，but he wants to be a police officer.
A: Why? Doesn’t he like his work?                        
B: No. He thinks it’s too boring. 
A: I think so.  But if he is a police officer，it’s a dangerous job.    
B: Yes，but it’s exciting work. I want to be a police officer，too.