我找不到另一只袜子了，它们总是一起消失。

I can't find the other ___sock, it always disappears together.

我有一只蓝色的袜子和一只红色的袜子。

I have one blue ___sock and one red ___sock.

我需要洗这只脏袜子。

I need to wash this dirty ___sock.