第1个回答 2006-09-27
who is that
回答时用THIS IS...
第2个回答 2006-09-27
who's that?
who's that speaking?
who am I talking to?
第3个回答 2006-09-27
Who is that speaking?请问您哪位?
This is ... speaking.我是.....
第4个回答 2006-09-27
除了以上的回答,还可以说
may i know who is calling?
may i know who i am speaking with?