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.
... But at the same time at least from what I've seen, which is ...
... other people's projects, in which case I feel weird talking about it because it's, like, ...