on/in freezing day People often wear gloves and hats to keep themselves warm (in/on) freezing day.为什么呢?

分类: 作业答案 • 2022-01-02 15:32:38

问题描述：

on/in freezing day People often wear gloves and hats to keep themselves warm (in/on) freezing day.
为什么呢?

答