根据对话内容，从右边的方框中的六个选项中，选出五个合适的句子补全对话。

Mike:Good afternoon, Susan.

 Susan:   ,Mike.

 Mike: Are you free this afternoon?

 Susan:   , why?

Mike: Would you like to go shopping with me?    

Susan:when?

Mike:I'll meet you at the school gate.

Susan:OK,.

Mike:See you.              

A.Good afternoon. B.I'd like to. C.See you then. D.You're welcome. E.Yes,I am free. F.At 2:00pm.