当打电话时,想知道对方是谁,用英语怎么问是不是who are you?还是who is that?
问题描述：
当打电话时,想知道对方是谁,用英语怎么问是不是who are you?还是who is that?
答
用Who is that?
在不知道是谁敲门时也可以这样用.
回答的时候可以用This is...