Even in ____(freeze)weather,you had better wash your face wi

freezing
freezing指“会让东西冻住的”（主动）；而frozen指“被冻住的”（被动）.
weather是（主动）让东西冻住,因此选freezing.

freeze,freezing,frozen
freeze是动词“结冰，凝固”；freezing可用作名词“冰点”，用作形容词“冰冷的”，用作副词“极冷地”；frozen既是freeze的过去分词形式，也可用作形容词，表示“冷冻的”。对比：
Water freezes below freezing. 冰点以下时水结冰。
It was freezing cold that m...