По идее тут все предложения должны быть в Present Simple. Но раз в задании просят составить вопрос и отрицание к Past Simple, предлагаю такое решение:

1. My working day began at six o’clock.
Did your working day begin at 7 o’clock?
No, my working day did not begin at 7 o’clock.

2. I got up, switched on the TV and brushed my teeth.
Did you brush your teeth after you got up?
No, I did not brush my teeth after I got up.

3. It took me about 20 minutes.
Did it take you 25 minutes?
No, it did not.

4. I had breakfast at seven o’clock.
Did you have breakfast at 8 o’clock?
No, I did not have breakfast at 8 o’clock.

5. I left home at half past seven.
Did you leave home at 8 o’clock?
No, I did not leave home at 8 o’clock.

6. I took the bus to the institute.
Did you take the train?
No, I did not take the train.

7. It usually takes me about fifteen minutes to get there.

8. Classes begin at eight.

9. We usually have four classes a day.

10. I had lunch at about 2 o’clock.
Did you have lunch at 1 o’clock?
No, I did not have lunch at 1 o’clock.