根据下面一段对话内容，从7个选项中选出能填入空白处的最佳选项，其中有两项为多余选项。

A:Yes,of course I do. ()

B:After the examination,please. First of all,why are you learning English

A:Why am I learning English

B:Yes,l mean,what are you going to do with it Are you going to be a teacher of English,or what else

A．You must have wronged me.

B．Oh! I’m so sorry about this.

C．Please stop just a second.

D．Are you Mr. Smith

E．But may I ask you something first

F．Is there anything I can do for you

G．Now, sit down please.