--Shall we play football this afternoon?

--________.

1. A.
   Yes, that's right.
2. B.
   OK. I'll be free then.
3. C.
   What's the matter?
4. D.
   Of course, you may.

—Shall we play football this afternoon?　

--_______

　　　 A. Yes, that’s right.　　　　　　　　　　　　　　 B. OK, I’ll be free then.

　　　 C. What’s the matter?　　　　　　　　　　　　 D. Of course, you may.

(2006年南通)

--- Shall we play football this afternoon?

--- ________.

[　　]