https://online1.tingclass.net/lesson/shi0529/0000/458/68.mp3
https://image.tingclass.net/statics/js/2012
Unit 68
(Hello, this is Peter speaking, can I talk to …Smith, George Smith…
Just a minute, I find somebody talk with you.
With you … a living example)
Is Tom there?
Speaking.
Is Peter/John there?
Speaking.
This is she/he speaking.
Hello, who is this?
Hello, who is this, please?
Who are you?