1. people know that they live in a small flat on the tenth floor
=> It is known that they live in a small flat on the tenth floor.
2. open your book
=> The book must be opened.
3. it is said that he is 108 years old
=> He is said to be 105 years old.
4. he got me to make some coffee
=> I was gotten to make some coffee by him.
5. people think that the earth was flat
=> The earth is thought to have been flat.
6. my brother has my mother mend his bike
=> My brother's bike was ment by my mother.
7. hang your hat on the wall
=> Your hat is hanged on the wall.
8. I get my friends to do my homework
=> My friends are gotten to do my homework.
9. they believed that he broke the value jar
=> It was believed that he broke the value jar.
10. people said that hoa got the first prize
=> It was said that Hoa got the first prize.
11. hang your hat on this wall
=> Your hat is hanged on this wall.