this is knife in the box（变复数句
问题描述：
this is knife in the box（变复数句
答
这句话变复数句是：These are knives in the boxes.句意：箱子里装的是小刀.
this is knife in the box（变复数句
这句话变复数句是：These are knives in the boxes.句意：箱子里装的是小刀.