change the sentences into passive voice
1. she washes the dog twice a week
`->`
2. Anna is completing the report at the moment
`->`
3. they helped at a party at home last week
`->`
4. the boy was reading comics at this time yesterday
`->`
5. she had done all the housework before she hung out with her friends yesterday
`->`
6. peter with visiting his grandparent next month
`->`
7. they are going to buy a villa next year
`->`
8. my father waters this flower every morning
`->`
