В тот день я болел и не был на заня

В тот день я болел и не был на занятиях.

Результаты (английский) 1:

That day I was sick and had not been in the classroom.

Результаты (английский) 2:

That day I was sick and was not in the classroom.

Результаты (английский) 3:

On the day I had been sick and had not been in the classroom.