（）见到客人站着，你应说，A.Si

请选择ABC+L3p2l-`1f7y2B8s5a6E6q见到客人站着，你应说，;p-W1C)r8t/K

A.Sit down.please.;p-W1C)r8t/K

B.How are you?;p-W1C)r8t/K

C.I'm fine，too.;p-W1C)r8t/K