do you know who she is 为什么用who she is

"Do you know who is she? who do you know she is还是who do you know is she? Do you know _____________? She is a dancer. A.who she is B.w do you know?who is she waiting for?改为宾语从句拜托了各位 Who is she?I don'know who is she? who she is? who she is... 请问 who is she? do you know who that is? Do you know who that American is do you know who is my teacher?