this is или these are?1)...........my mothers friend.2)..............my friends pets.3)......Mr Browns children.4)........ the boys snowmen.5)............Kates goose

this is- употребляется в единственном числе,а These are - во множественном

1 this is2 these are3 these are 4 these are

This is my mother's friendThese are my friend's petsThis is Mr Brown's childrenThese are the boys snowmenThis is Kate's goose