将下列句子改为复数句1this is hs sister 2.that is my brother 3it is a box
问题描述：
将下列句子改为复数句
1this is hs sister 2.that is my brother 3it is a box
答
these are he sisters
答
These are his sisters.
Those are my brothers
They are boxes.
初一的内容
答
these are his sisters.
those are my brothers
they are boxes.
答
These are his sisters. thosr are my brothers these are boxes