There are three _______(knife)in the box.

问题描述:

There are three _______(knife)in the box.

There are three knives(knife)in the box. 对吗?

There are three knives(knife)in the box.
knife变复数是不规则的,复数形式是knives

knives

There are three ___knives____(knife)in the box.
knife是可数名词,复数形式是knives