Passive Voice - 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!
1a) James Watt developed the first steam machine.
1b) .
2a) Peter did not feed the dogs.
2b) .
3a) Graham Bell invented the telephone.
3b) .
4a) Josephine Cochrane invented the dishwasher.
4b) .
5a) Kira bought new shoes.
5b) .
6a) Jack the Ripper killed five women.
6b) .
7a) Jason found some keys.
7b) .
8a) Tamara's mum told her to tidy up her room.
8b) .
9a) Marianne put the English books on the shelf.
9b) .
10a) Mr Bond followed them.
10b) .
11a) I made a big mistake.
11b) .
12a) I didn't call Laura.
12b) .
13a) The pupils made a lot of mistakes.
13b) .
14a) We planned a trip to Hoy.
14b) .
15a) We drank two boxes of coke.
15b) .