1. Mary was given this present an hour ago.

2. I was told that our teacher was luck.

3. He was made to study for the exam by his parents.

4. Your bike might be stolen if you leave it outside.

5. Has this telephone been repaired ?

6. The trophy was presented to the winner by the president.

7. I was paid a lot of money to do that job by Duy.

8. Nothing could be done to put the fire out.

1) Someone gave Mary this present an hour ago.

=> Mary was given this present an hour ago.

2) They told me that our teacher was luck. 

=> I was told that our teacher was luck.

3) His parents made him study for the exam.

=> He was made to study for the exam by his parents.

4) Someone might steal your bike if you leave it out side

=>Your bike might be stolen if you leave it outside.

5) Has someone repaired this telephone?

=> Has this telephone been repaired ?

6) The president presented the trophy to the winner.

=> The trophy was presented to the winner by the president.

7) Duy paid me a lot of money to do that job.

=> I was paid a lot of money to do that job by Duy.

8) No one could do anything to put the fine out.

=> Nothing could be done to put the fire out.