2. They called a doctor. He lived nearby.
---> They called a doctor who lived nearby.
3. I wrote an email to my sister. She lives in Italy.
----> I wrote an email to my sister who lives in Italy.
4. Linh liked the waiter. He was very friendly.
----> Linh liked the waiter who was very friendly.
5. We broke a car. It belonged to my uncle.
-----> We broke a car which belonged to my uncle.
6. Ba dropped a cup. It was new.
----> Ba dropped a cup which was new.
7. Nam loves books. They have happy endings.
----> Nam loves books that have happy endings.
8. I live in a city. It is in the north of Vietnam.
----> I live in a city which is in the north of Vietnam.
9. The man is in the class. He is wearing a blue hat.
---> The man who is wearing a blue hat is in the class
10. The woman works in a hospital. She is from India.
--->The woman who is from India works in a hospital
11. My sister has four sons. She lives in Japan.
----> My sister who lives in Japan has four sons