12. I'm a bit worried about Kate. She ______. a) haven't phoned b) hasn't phoned c) not phoned d) didn't phoned

hasn't phoned — с she в Present Perfect используется has; отрицательная форма — hasn't.

I'm a bit worried about Kate. She hasn't phoned. (Я немного волнуюсь за Кейт. Она не позвонила.)