1. The cook will order the vegetable$ \Rightarrow$ the vegetable will be ordered by the cook
2. Children in England in winter make snowball and throw at each other
$ \Rightarrow$ snowball is made and thown by the children in England in the winter
3. He found the book boring
$ \Rightarrow$ the book was found borring
4. My mother used to make us clean the house
$ \Rightarrow$ we used to be made clean the house
5. What language do people speak in this country?
$ \Rightarrow$ what language is spoken in this country?
6. I heard the bell ring
$\Rightarrow$ the bell ring was heard by me
7. Do people use milk for making butter and chesse?
$\Rightarrow$ is milk used for making butter and chesse?
8. How many trees did they cut down to build that fence?
$\Rightarrow$ How many trees were cut down to bild that fence?