Tom ve Mary hangisini satın alacakları konusunda anlaşamadılar.
- Tom and Mary couldn't agree on which one to buy.
O, onu hangi kitabı satın alacağı konusunda yönlendirdi.
- She advised him on which book to buy.
... about breast cancer recently in the New York Times, and it mentioned a figure which I found ...
... Which will be really exciting. ...