Excuse me.Who is that?回答应该是—— Tom.

Excuse me.Who is that?回答应该是—— Tom.
Excuse me.Who is that?回答应该是—— Tom.

Excuse me.Who is that?回答应该是—— Tom.
It's /that's,因为那个人他并不认识,而且是问第三个人,也许Tom在远处,怎么会填this呢,

This's
这个是电话用语哦
问别人说谁 用who is that 不用Who are you？
回答自己是谁的时候说This is XXX
希望帮到你哦

THis is