在过去，人们更依赖手写信件，而不是即时通讯。

In ___the ___old ___days, people relied more on handwritten letters than instant messaging.

我祖父常常怀念互联网改变日常生活之前的旧时光。

My grandfather often reminisces about ___the ___old ___days before the internet transformed daily life.

与过去不同，环保意识如今已成为公共政策的核心。

Environmental awareness, unlike in ___the ___old ___days, is now at the forefront of public policy.