=>
1. I bought a motor which I can use to travel to work every day.
2. My cell phone, which I only bought a month ago, has become necessary part of my life.
3. My roommate, who is afraid of computers, has never been on the Internet.
4. Some people dream of a job which they can do without technology.
5. The man whom/that you were talking to is a computer expert.
6. Some documents which were stolen from a car have been found.
7. Marta has a brother whose name is Manuel.
8. The dog which is mine won the race.
9. Show me the shoes which you bought yesterday.
10. We enjoy reading books which tell us many interesting things around our life.

Which -> Đtqh chỉ vậtt

Who -> Đtqh chỉ người

Whom -> Đtqh chỉ người (tân ngữ)