1. 给问句选答语。

A. They are on their way home. B. They are playing chess. C. No，she is a teacher. D. They arrive in Beijing at 10 in the morning. E. Beijing is great!

1. （1） What do you think of Beijing?  
   
3. （2） Is she a student?    
5. （3） What are these old men doing?    
7. （4） Where are they?    
   
9. （5） When do they arrive in Beijing?