Biz onların hangi trenle geleceklerini bilmiyorduk.
- We didn't know on which train they'd be coming.
O, onu hangi kitabı satın alacağı konusunda yönlendirdi.
- She advised him on which book to buy.
... the physical size of the ad-- is smaller, which actually ...
... Which is really helpful, because it helps you to be able ...