1．When will the train arrive?
A．At 12:15． B．At 12:30． C．At 12:45．
2．Where does the conversation most probably take place?
A．In a library, B．In the classroom． C．In a bookstore．
3．What's the most probable relationship between the two speakers?
A．Husband and wife． B．Teacher and student． C．Customer and salesman．
