她身体太差了，连拎购物袋都费劲。

She is too ___unfit to carry the shopping bags without struggling.

他的身体状况不适合参加马拉松比赛。

His physical condition made him ___unfit for the marathon.

法官判定这对夫妇不适合抚养孩子。

The judge found the couple ___unfit to raise children.