根据对话内容从方框中选择能填入空白处的最佳选项补全对话。

A：

B：Good afternoon．

A：

B：Yes, I am．

A：

B：I'm in Miss Yang's class．

A：

B：Fine, thank you．How are you?

A：Fine, thanks．It's time to go to your class now．

B：

A：Bye．

A．Are you a new student? B．How are you? C．Good afternoon． D．What class are you in? E．Goodbye．