请选择ABC*V)?4f7Z+B7i4Z+]*`7Z,i-j见到客人站着，你应说，9b3|0I4b6p4p-D5c
A．Sit down．please．9b3|0I4b6p4p-D5c
B．How are you？9b3|0I4b6p4p-D5c
C．I'm fine，too．9b3|0I4b6p4p-D5c