when I run up or down stairs,I can't hold a k________ in my hand.That will hurt mek和横线上的字母是一个单词

问题描述:

when I run up or down stairs,I can't hold a k________ in my hand.That will hurt me
k和横线上的字母是一个单词

knife
根据句意
当我上下楼梯时,手里不能拿这一把小刀,那样可能会伤害到我