Always remember put such dangerous things as knives out of children’s A．...

C

本题考查名词。out of one’s reach意为“够不着，拿不到”。out of touch意为“没联系”；out of sight意为“没看见”；out of distance意为“距离很远”。句子意思是“总是要记得将小刀这类危险的东西放到小孩拿不到的地方。”故选C。