-Who are you sleep with?.....X Who are you sleeping with?.......O All the rest are correct.

Thank u so much !

see , you can express the same meanings easier : - What year was she born? >>>> in what year was she born ? or , how old is she ? ............. -Who was she with? i think that's right and you can say too : with whom was she ? ............... -Who are you sleep with? sleeping ( with whom are you sleeping ? ) that's present continuous or , with whom do you sleep ? ( present simple ) -Who did you sleep with? well -Where were you? well