There’s the man whom wife knows your brother.

• Sai: "whom" không đúng vì "wife" cần có một đại từ sở hữu.
• Sửa: "whose" (Đúng câu: There’s the man whose wife knows your brother.)

This is the only place which we can obtain scientific information.

• Sai: "which" không đúng vì "place" chỉ địa điểm, nên cần dùng "where".
• Sửa: "where" (Đúng câu: This is the only place where we can obtain scientific information.)

1975 is the year in when the revolution took place.

• Sai: "in when" không đúng vì "when" đã chỉ thời gian, nên không cần "in".
• Sửa: "when" hoặc "in which" (Đúng câu: 1975 is the year when the revolution took place. hoặc 1975 is the year in which the revolution took place.)

The hotel where we stay in last year was excellent.

• Sai: "stay in" không đúng vì "stay" cần được chia ở thì quá khứ.
• Sửa: "stayed" (Đúng câu: The hotel where we stayed last year was excellent.)

He will take us to the town which we can see old temples.

• Sai: "which" không đúng vì "the town" là địa điểm, nên cần dùng "where".
• Sửa: "where" (Đúng câu: He will take us to the town where we can see old temples.)

My teacher who husband works as an artist can compose songs.

• Sai: "who" không đúng vì "husband" cần có đại từ sở hữu.
• Sửa: "whose" (Đúng câu: My teacher whose husband works as an artist can compose songs.)

My friend George, that arrived late, was not permitted to enter the class.

• Sai: "that" không đúng vì "George" là người, nên cần dùng "who".
• Sửa: "who" (Đúng câu: My friend George, who arrived late, was not permitted to enter the class.)

This is the only place which we can obtain scientific information.

• (Giống câu 2, nên cách sửa giống nhau.)
• Sửa: "where" (Đúng câu: This is the only place where we can obtain scientific information.)

Chemistry is one branch of science on that most of the industries depend.

• Sai: "on that" không đúng vì cấu trúc là "on which".
• Sửa: "on which" (Đúng câu: Chemistry is one branch of science on which most of the industries depend.)

1975 is the year in when the revolution took place.

• (Giống câu 3, nên cách sửa giống nhau.)
• Sửa: "when" hoặc "in which" (Đúng câu: 1975 is the year when the revolution took place. hoặc 1975 is the year in which the revolution took place.)

Do you remember the year which you started learning the first English course at the British Council?

• Sai: "which" không đúng vì "the year" là thời gian, nên cần dùng "when".
• Sửa: "when" (Đúng câu: Do you remember the year when you started learning the first English course at the British Council?)

This novel, which written by a well known writer, should be read.

• Sai: "which written" không đúng vì thiếu động từ phụ "was" trong cấu trúc bị động.
• Sửa: "which was written" (Đúng câu: This novel, which was written by a well-known writer, should be read.)