This is my pencil.（改为复数句） It's his backpack.（改为复数句）
问题描述：
This is my pencil.（改为复数句） It's his backpack.（改为复数句）
答
they are my pencils.
they are their backpacks.
答
those are my penciils
that is my backpack
给分吧 哈哈
答
These are my pencils.
They're his backpacks.