I was at church on the monday 为何要加不用加the?

I was at church on the monday 为何要加不用加the? i was at church on sunday .i was at the office on monday.为什么 i was at church on Sunday.church前面为什么不用the at home 和at church中间为什么不用加the i was at the office on monday I was at the office on Monday 翻译 英语the的用法1.i was at church on sunday.2.i was at the office on I was at church on Sunday My last appoint at the dentist was on Monday at home不用加the at the baker's为什么要加the I was at 4 last sunday!1、the church's 2、grocer's 3、the dairy He was not___(bad)hurt and arrived at the church on time.咋填,