les exemples

• - Which?
  كلا - أيهما؟ -
• - Which?
  أي منها
• - Which?
  من؟ - الكثيرين -
• Which-- Which ones?
  أى..أى واحد فيهم ؟
• Which-which I'm not.
  و التي لست أنا
• -Which? -Which what?
  أيهما؟ - ماذا؟ -
• Which things? Which things?
  أي أشياء؟ أي أشياء؟
• Which one? Which?!
  أَيّ واحد؟ أَيّ؟ !
• Which one's which?
  أي منهم هي؟
• Which one? Which ball?
  أي واحدة؟ أي كرة؟

Notices

• being the one just referred to;and this or these;asking for choice from a definite set of alternatives