who is that和who is it假如：A：There is someone knocking at the door.Who is that/it?用哪个?B：That/it may be John用哪个?

I hope that who he love is who is that man? Who is that girl? ‘who is that girl Who is that ,please? Who is that? who is that for? i am who is --Hello.May I speak to Jim,please?-- _________?Who are you Who is he Who’s that Who is it This is the boy ----------I think (who/that)is the smartest.是用that 还是who? I know who is the right person that I should who is that little girl? who is that little boy is lady that who old Who is that woman 翻译 who is that wonan young who is that怎么回答 who is that?如何回答