There are some knives in the box.【改为单数】

来源：学生作业帮助网编辑：作业帮时间：2024/05/07 04:32:22

There are some knives in the box.【改为单数】
There are some knives in the box.【改为单数】

There are some knives in the box.【改为单数】
There is a knife in the box.