Can I be corrected where I am wrong? ¿Me pueden corregir en donde estoy mal?

Make one relative sentence from two. Use the sentence in brackets to make a relative clause. Join them with who, which, that and where

Example:
-Cancun (I have a friend there) is a beautiful city.
-Cancun, where I have a friend, is a beautiful city.

1. A bullfighter is a person (he kills bulls in a bull-ring). 
A bullfighter is a person that kills bulls in a bull-ring. 

2. My best friend (he is a taxi driver) lost his keys.
My best friend, who is a taxi driver, lost his keys. 

3. A soap-opera is a program (it changes peoples ideas about real life).
A soap-opera is a program which changes peoples ideas about real life.

4. A radio is a device (it lets people listen music and news).
A radio is a device that lets people listen to music and news. 

5. A restaurant is a place (people go there to eat). 

A restaurant is a place where people go to eat.

6. A computer is a device (it helps people do different things).
A computer is a device which helps people do different things.

7. The chupacabras is a monster (it lives in peoples minds).
The chupacabras is a monster which lives in peoples mind.

8. A butcher is a person (he sells meat in a butcher’s shop).
A butcher is a person who sells meat at a butcher shop. 

9. A church is a place (people go there for singing and praying). 

A church is a place where people go for singing and praying.

10. The hospital (my mother works there) is far away from home.
The hospital where my mother works is far away from home.