请选择AB.f,x0U9m3a A: Can I come in ? B:______________.'I9X1^;v9G3g6Q/X,H-J9P9r
A. Yes, I can.'I9X1^;v9G3g6Q/X,H-J9P9r
B. Yes , please.'I9X1^;v9G3g6Q/X,H-J9P9r