please tell me which is correct.

please tell me which is correct. who is she? and who is her.which one is correct? tell me why Which is correct.Please explain it. which one is correct ?help me! thanks! 下面两个英文句子哪个是对的?could you please tell me which is t Excuse me,could you please tell me which gate ___? which sentence is correct? which word is correct which is correct?why? Which one is correct? Please tell me who is she? NC is what?please tell me,thanks!