下列日常生活用语中，表示电话对话的句子是（）

• A、Hello, this is Li. May I speak to Chen, please?
• B、Hold on, please.
• C、Would you hold the line, please?
• D、Who's calling, please?
• E、I'm sorry. I think you have the wrong number.
• F、I'm sorry, but Chen is not available to come to the phone right now. May I take a message?