Who is speaking?

Who is that speaking? hello!who is that speaking? who is that speaking?为什么回答是This is...speaking hello who is that speaking什么意思 This is John speaking.Who's that? who is the woman is speaking to my mum Hello!Who is ______?--- ______ is Mary speaking the man who is speaking is very handsome主谓宾 Who is the boy ____ is speaking there? hello,this 1234,this is A here.who is speaking?B speaking,ma Look!Who ____(is speaking,speaks) English in the park? Who is that speaking 回答用this 还是that