Beginner Level Advanced Level
INTERMEDIATE LEVEL
Content
at that time, in those times, in those days ☊ 
vào thời đó ☊
→ → →
like: vào thời đó → →
Nobody had much money at the time and I was no exception. ☊ exception ☊
Fax machines were a wonderful invention at the time. ☊ invention ☊
There was a war on at the time. ☊ on ☊