(英语电话用语)This is……speaking/Speaking

(英语电话用语)This is……speaking/Speaking this is Mary speaking和it is Mary speaking这两种电话用语的区别 简单的英语电话用语如This is sb.speaking等 英语中电话用语is that speaking?回答是 yes,it is 还是she is 或者he is?this This is …〔speaking〕是什么意思 英语的电话用语中,sb. speaking是什么意思? This is Helen speaking. this is tom speaking ( this is Kangkang speaking. Is this Tom speaking? This is she speaking. this is Jack speaking