1,The director signed the letter
--->The letter
2,An artist wrote that interesting article
--->That interesting article
3,They returned those books to the libraray
--->Those books
4,They didn't tell people the plan
--->People
5,The company built the new factory
--->The new factory
6,She didn't show the design to anyone
--->The design
7,He bought a new house last year
--->A new house
8,We clean the classroom every day
--->The classroom
--->The
1,The director signed the letter
--->The letter was signed by the director
2,An artist wrote that interesting article
--->That interesting article was written by an artist
3,They returned those books to the libraray
--->Those books were returned to the library
4,They didn't tell people the plan
--->People weren't told the plan
5,The company built the new factory
--->The new factory was built by the company
6,She didn't show the design to anyone
--->The design wasn't shown to anyone
7,He bought a new house last year
--->A new house was bought by him last year
8,We clean the classroom every day
--->The classroom is cleaned by us every day
