who is that和who's this

who is that和who's this This is John speaking.Who's that? who is this和who is that有什么区别? This is Peter speaking.Who' this?问对方不应该是Who's that? 1.ello,this is Ann.Who's that,please? 1.Who’s that speaking?This is Tom__________ . who is that和who is it who's room is that? 对This is Tom speaking.中的Tom怎么提问?是Who is that?还是Who is that s who is that?A.That's a student B.It's Bob C .This is Bob who's that?和who is that?是同样意思吗? 英语选择题：Who's that? ( ) is Lucy. A This B It C That D She's