Turn the following sentences into the passive voice
1.They make these artificial flowers of silk 2.They feed the seals at the zoo twice a day 3.Who wrote it? 4.They showed her the easiest way to do it 5.Lightning struck the old oak 6.A jellyfish stung her 7.What did he write it with? - He wrote it in pencil.

These artificial flowers are made of silk.The seals at the zoo are fed twice a day.Who was this written by?The easiest way to do it was shown to her.The old oak was struck by lightning.She was stung by a jellyfish.What was it written with? - It was written in pencil