who is that?it must be Mary.为什么不能用she?

who is that?it must be Mary.为什么不能用she? who is that man?It must be her.为什么回答不是that must be her或者this must be her呢 it is Tom that is who Who is that ocer here?It is Who is it?Who is that?的区别. 请问Who is it who lives in that big house? -Who ＿＿it be that is knocking at the door -It＿＿b-Who ＿＿it be that is knocking at the door -It＿＿be Father ,but I'm not sure .A.can ;must B.can ;may C.must ;can D.may ;must 这题选什么?为什么?老师又公布答案了：选A！但 It is Jack closes—— the windows.so we must thank him.A,what B.who C.that D.whom Who is that in the room?It is me.知识点 It is my dream that i must come true That watch is important for me.l must f-----it it does not matter who____i am talking to.A.who it is B who it is that C.it is who D.it is whom who is singing?it must be susan.为什么是用it --Hello.May I speak to Jim,please?-- _________?Who are you Who is he Who’s that Who is it 英语强调句it is ...that/who..that/who可以用when换吗 英语的强调句结构it is...that/who...,什么时候用that,什么时候用who? Who's that?A It's Tom BThis is Tom It is you who always spoil me that