Passive Voice - Simple Present AND Simple Past

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. Note that you will lose points if you ask for hints!
Change these sentences from active voice to passive voice or vice versa. YOU have to decide whether to use the Simple Present or the Simple Past.

1a) My car (steal) last week.
1b) Somebody last week.
2a) The best cake (make) by my mum.
2b) .
3a) Christmas (celebrate) all over the world.
3b) People all over the world .
4a) Sue (deliver) the newspaper every morning.
4b) Every morning by .
5a) Mice (eat) by cats.
5b) .
6a) At Christmas time millions of greeting cards (write) by people from all over the world.
6b) At Christmas time .
7a) Good staff (need) in every company.
7b) .
8a) Mr King (drive) the school bus.
8b) The school bus by Mr King.
9a) Mary (find) some money in the gymnasium yesterday.
9b) Yesterday in the gymnasium.
10a) The fridge (clean) every week by Ellena.
10b) every week.
11a) She usually (tidy) the hamster's cage on Wednesdays.
11b) on Wednesdays.
12a) The old bike (sell) last month by him.
12b) last month.
13a) The dishes (do) every evening by Sue.
13b) every evening.
14a) They (build) a library in my town last year.
14b) last year.