1. We visited the monument. The famous engineer built it more than 50 years ago.

⇒ We visited the monument which the famous engineer built more than 50 years ago.
2. The victims of the club need help. They were starved for many days.

⇒ The victims of the club who were hafl-starved for many days need help.
3. The baby was still alive. He was lifted and put down a hundred meters away by the tornado.

⇒ The baby who was lifted and put down a hundred meters away by the tornado was still alive.

4. The weather forecast program take place at 8:oo pm every day. Some people like to watch it.

⇒ The weather forecast program, which some people like to watch, take place at 8:00 pm every day.

5. Mr Phong is our geography teacher. He has been teaching in our school for ten years.

⇒ Mr Phong, who has been teaching in our school for ten years, is our geography teacher.
6. A typhoon is a violent tropical storm. It can cause great destruction.

⇒ A typhoon which can cause great destruction is a violent tropical storm.

7. Mr. Tuan teaches us chemistry. His friends are also my friends’ father.

⇒ Mr. Tuan teaches us chemistry whose friends are also my friends’ father.

8. The children talked about the clowns and his animals. They saw them at the circus.

⇒⇒ The children who saw them at the circus talked about the clowns and his animals.

9. The tornado struck with a great force. It lifted the houses off the ground.

⇒ The tornado which lifted the houses off the ground struck with a great force.

10. Lan took some change. She wanted to buy some drink.

⇒ Lan, who wanted to buy some drink, took some change.

11. The boys are very interesting in football. It is a popular games all over the world.

⇒ The boys are very interested in football which is a popular games all over the world.

12. Her grandma wanted to listened to the news on TV. She was interested in the newsreel.

⇒ Her grandma, who was interested in the newsreel, wanted to listened to the news on TV.
13. This is the simple house. Uncle Ho had lived there for a long time ago.

⇒ This is the simple house where Uncle Ho had lived for a long time ago.

14. Mrs Lien is very smart. I met the son of her on the stage last night.

⇒ Mrs Lien is very smart whose son I met on the stage last night.

15. Mr. Quang is a famous chef cook. His food can be enjoyed all over the world.

⇒ Mr. Quang is a famous cheft cook whose food can be enjoyed all over the wold.
16. Children like to eat ice-cream. It can cause toothache if they have too much everyday.

⇒ Children who can cause toothache if they have too much everyday like to eat ice-cream.

17. Thu wants to drink some medicine. She had a headache.

⇒ Thu, who had a headache, wants to drink some medicine.
18. Lan went back home. Her child was seriously ill after the rain.

⇒ Lan went back home whose child was seriously ill after the rain.