This is a happy family.(改为复数)

This is a happy family.(改为复数) This is a big family.改为复数句,请速回! This is a photo of my family (改为复数形式） This is my family photo.改为复数形式 This is a photo of my family (改为复数形式)为什么不改my family为our fami I have a happy family.This is my sistre. Is this a bus （改为复数句 This is a box.改为复数形式 this is a box改为复数 this is a pencil改为复数句 This is a bus.改为复数. This is a shirt .改为复数句