听力原文:W: let's go playing ping -pong ball.M : I can't go right now. I have an appointme
听力原文:W: let's go playing ping -pong ball.
M : I can't go right now. I have an appointment with my doctor.
Why can't the woman go playing ping -pong ball right now?
A.She must do something else at first.
B.She doesn't like playing ping -pong at all.
C.She cannot afford the time.
D.She has an important appointment with her doctor.