如何进行电话交谈，打电话常用词有…

如何进行电话交谈，打电话常用词有：

打入电话：-May I speak to……? Hello. Can I speak to……? I want to speakto……
接电话：-Speaking./ Who is speaking, please?
自我介绍：-My name is …… This is……
讲述事由：-I’m calling about……
其他状况：-Hold the line. The line is busy/engaged.