13. A. My class is over there                    B. Glad to meet you.   

C. What's your name?                     D. How old are you?

12. A. Let's go.                             B. This way, please.

   C. They are new.                         D. All right.

11. A. I am.                               B. Yes, I am.

   C. Ann is not here.                        D. Sorry, he is not at school.