Kiminle konuşuyordun? - With whom were you speaking?
Kiminle konuşuyordun?
With whom were you speaking?
Noeli kiminle geçiriyorsun? - With whom are you spending Christmas?
Noeli kiminle geçiriyorsun?
With whom are you spending Christmas?
... with people some of whom were still ...
... get into Harvard, one of whom goes ...