Избрать правильное местоимение.Is this (your/ yours) book?It39;s (their/ theirs) door, not

Избрать правильное местоимение.Is this (your/ yours) book?It39;s (their/ theirs) door, not (our/ ours)They39;re new pupils and I don39;t know (their/ theirs) names(My/ Mine) flat is bigger than (her/ hers), but (her/ hers) is nicer.That39;s not (my/ mine) book, (my/ mine) is new.They took (our/ ours) books and we took (their/ theirs)Are these pencil (her/ hers)?Is this (your/ yours) house or (their/ theirs) ?