do you know the boy___is standing at the door.我知道填who,填that可

do you know the boy___is standing at the door.我知道填who,填that可 jack,do you know the man standing at the door? Ben do __(you) know the man standing at the door Yes __ (I） The boy who is standing at the door is my brother."who is "可 do you know the man standing at the door?中现在分词是作后置定语还是作宾主补足 Do you konw the woman who is standing [] the subway door[]lo i don't know what this is.do you know who the girl standing 英语中 Do you know the name of the boy standing at the gate?这句话 Do you know the name of the boy standing at the gate?为什么用sta Who is that at the door? Who is that at the door ？ Who's that at the door