who is that和who's this
问题描述：
who is that和who's this
hello.____?
hello.this is mary speaking
A who are you b who is this
c who's that d are you mary
B和C选那个啊?
我选的是B不晓得对不~
答
我是美国人
我同意
emilyxuxu's
答案
（“b who is this
电话里面问对方是谁就是这样问”）