A. on    
B. at    
C. of

                           A                                                            
(     ) 1. How's the weather in Canada?                
(     ) 2. May I come to see your school?                  
(     ) 3. How much for this stamp?  
(     ) 4. Where do you write on a postcard?     
(     ) 5. Where do you put the address?                                                              
(     ) 6. Do you have a computer in Canada?      
(     ) 7. Where do you put the stamp?           
(     ) 8. Does Danny know his address?            
(     ) 9. What are you doing?                    
(     ) 10. Do you know where the post office is? 
                B                     
A. I'm writing a letter.        
B. No, he doesn't.                 
C. Yes, go straight down the street. Turn left at the traffic lights.               
D. Yes, I have.                   
E. In the top, right corner of the postcard.                           
F. On the right.              
G. Two yuan.                          
H. Sure.                          
I. On the left.                     
J. It is snowy.