1, Whose  - > that

2, whom - > which

3, whom -> who

4, about - >∅

5, where - >bwhen

6, When - > Why

7, she ->∅

8, where ->when

1, She is the most beautiful girl whose I have ever met

-that

2, She can't speak English,whom is a disadvantage

-which

3, The policeman must try to catch those people whom drive dangerously

-who

4, The person about who I told you yesterday is coming here tomorrow

-∅

5, Mother's Day is the day where children show their love to their mother

-when

6, Do you know the reason when we should learn English?

-why

7, The woman who she told me the news was not a native citizen here

-∅

8, New Year Day is the day where my family members gather and enjoy it together

-when

1. Câu gốc: She is the most beautiful girl whose I have ever met.
   Chữa: She is the most beautiful girl who I have ever met.

2. Câu gốc: She can’t speak Vietnamese, whom is a disadvantage.
   Chữa: She can’t speak Vietnamese, which is a disadvantage.

3. Câu gốc: The policeman must try to catch those people who drive dangerously.
   Chữa: The policeman must try to catch those people who drive dangerously. (Câu này không có lỗi, có thể giữ nguyên)

4. Câu gốc: The person about whom I told you yesterday is coming here tomorrow.
   Chữa: The person whom I told you about yesterday is coming here tomorrow.

5. Câu gốc: Mother’s Day is the day that children show their love to their mother.
   Chữa: Mother’s Day is the day when children show their love to their mother.

6. Câu gốc: Do you know the reason why we should learn English?
   Chữa: Do you know the reason that we should learn English? (Tuy nhiên, câu gốc không sai)

7. Câu gốc: The woman who told me the news was not a native citizen here.
   Chữa: The woman who told me the news was not a native citizen here. (Câu này không có lỗi, có thể giữ nguyên)

8. Câu gốc: New Year Day is the day when my family members gather and enjoy it together.
   Chữa: New Year Day is the day when my family members gather and enjoy it together. (Câu này không có lỗi, có thể giữ nguyên)

9. Câu gốc: The film which I watched yesterday was interesting.
   Chữa: The film that I watched yesterday was interesting. (Câu này cũng không có lỗi, có thể giữ nguyên)

10. Câu gốc: The only house to be painted last week was Oanh’s.
    Chữa: The only house that was painted last week was Oanh’s.

• She is the most beautiful girl whom I have ever met.
• She can’t speak Vietnamese, which is a disadvantage.
• The policeman must try to catch those people who drive dangerously.
• The person about whom I told you yesterday is coming here tomorrow.
• Mother’s Day is the day when children show their love to their mother.
• Do you know the reason why we should learn English?
• The woman who told me the news was not a native citizen here.
• New Year Day is the day when my family members gather and enjoy it together.
• The film that I watched yesterday was interesting. (or "The film which I watched yesterday was interesting.")
• The only house to be painted last week was Oanh’s.