電話禮儀
    Hello, this is Tom.
    Could I talk to Mr. Brown?
    May I ask who is calling, please?
    Hang on a moment, please.
    I'm sorry. He is not in.
    I have to go.
    Thank you for calling.
    I'm afraid you've got the wrong number.
    The line is busy.
    There is a lot of background noise here.