听小对话，请从A 、B 、C 三个选项中选择正确的选项。
1. What's this?
A. J                    
B. L                  
C. X
2. Is this Kate's ruler?          
A. Yes, it is.              
B. No, it's Jim's ruler.    
C. No, it's Bob's ruler.
3. Who is David ?
A. Mr White's cousin.        
B. Mr. White's son.        
C. Mr. White's student
4. What's Ed's room number?          
A. It's 523.              
B. It's 623              
C. It's 532
5. What color is his pencil case?          
A. Red.                
B. Green.              
C. Yellow.