1. They built the bridge 10 years ago.

=> This bridge was build ten years ago.

2. Someone stole Nam’s wallet.

=> The windows were broken by the boys yesterday.

3. She bought a new hat last night.

=> A new hat was bought by her.

4. No one believes his story.

=> His story isn't believed.

5. She showed her ticket to the airline agent.

=> Her ticket was showed to the airline agent by her.

6. Our teachers have explained the English grammar.

=> The English grammar has been explained by our teachers.

7. They finished the kitchen’s building on Saturday.

=> The kitchen's building was finished on Sunday.

8. Tom will visit his parents next month.

=> Tom’s parents will be visited next month.

9. The students have discussed the pollution problems since last week.

=> The pollution problems have been discussed by the students last week.

10. We should clean our teeth twice a day.

=> Our teeth should be cleaned twice a day.

cho mình xin ctlhn nhé

1. The bridge was built 10 years ago.

2. Nam's wallet was stolen.

3. A new hat was bought last night.

4. His story isn't believed.

5. Her ticket was showed to the airline agent.

6. The English grammar has been explained by our teachers.

7. The kitchen's building was finished on Saturday.

8. Tom's parents will be visited next month.

9. The pollution problems have been discussed by the students last week.

10. Our teeth should be cleaned twice a day.