1. Mr.Pike designed that bridge in 1970
-> That bridge was designed by Mr.Pike in 1970
2. They mailed the boxes.
-> The boxes were mailed
3. He read all the little to his friends yesterday
-> all the little were read to his friends yesterday
4. They did not invite Bill and Ann to the party
-> Bill and Ann weren't invited to the party
5. Miss Peter wrote all of the reports for Mr. Johnson
-> all of the reports for Mr. Johnson were written by Miss Peter
6. The teacher corrected our homework
-> our homework were corrected by the teacher