1/ Was I translating the article from 5 to 6 o"clock?
Is our teacher late?
2. was I translating the article or a text from 5 to 6 o"clock?
Is our or their teacher late?
3 Who was translating the article from 5 to 6 o"clock?
Who is late?
4 When was I translating the article?
When does our teacher come?
5 I was translating the article from 5 to 6 o"clock, wasn't I?
Our teacher is late, isn't she?