Check my answers (Passive Voice)

The answers that I consider correct, I will highlight in bold italic.

1. The floors in the office ___ every day.
a) are swept
b) will have been swept
c) were being swept
2. An old woman ___ while she was living with her children.
a) is being looked after
b) was being looked after
c) will be looked after
3. I think the money ___ back in the nearest future.
a) had been paid
b) were paid
c) will be paid
4. My car ___ at the moment.
a) was being repaired
b) has been repaired
c) is being repaired
5. The exams ___ by 3 in the afternoon.
a) will have been finished
b) were being finished
c) are being finished
6. Olympic Games ___ every four years.
a) are held
b) had been held
c) will have been held
7. When we returned home, the walls ___.
a) has been painted
b) had been painted
c) will be painted