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11. Mr Parker, whom I spoke to on the phone, was interested in my project.
12. The woman who is making a speech is the Minister of Agriculture.
13. Mary was given a lot of information, most of which was completely inaccurate.
14. Volleyball, which is a popular sport, is very good for health.
15. There were a lot of people at her birthday party, only a few of whom she had met before.
16. The mountain which is called Everest is the highest mountain in the world.
17. Michiko, who has lived in Japan for 10 years, has gone through several earthquakes.
18. Here is the assignment, which you must finish before going to the class.
19. She has come up with some amazing ideas which we discuss at the meeting.
20. The university where the freshmen can live guarantees accommodation in halls of residence.
Who -> đtqh chỉ người
Whom -> đtqh chỉ người (tân ngữ)
Which -> đtqh chỉ vật
Giới từ + whom/which