1. You need to talk to a person whom you can trust.
→  C. whom

2. Bob is the kind of person you can talk about anything.
→  D. ϕ (bỏ đại từ quan hệ vì “you can talk to him” → tân ngữ → có thể lược bỏ)

3. He is a person whose friends trust him.
→  D. whose

4. I'm looking for an electric can opener that also can sharpen knives.
→  C. that

5. People who live in glass houses shouldn’t throw stones.
→  A. who

6. The problems that Tony has seem insurmountable.
→  C. that

7. The man whom I introduced you to last night may be the next president of the university.
→  B. whom

8. Cathy is trustworthy. She’s a person you can always depend on.
→  D. ϕ (vì “depend on her” → có thể bỏ đại từ quan hệ)

9. Your career should focus on a field in which you are genuinely interested.
→  A. in which

 Ghi nhớ nhanh:

• who → chỉ người, làm chủ ngữ.

• whom → chỉ người, làm tân ngữ.

• whose → chỉ sở hữu.

• which/that → chỉ vật.

• Có giới từ (in, on, to, about, with...) → dùng whom/which hoặc lược bỏ trong văn nói.