7. The person was very friendly. I spoke to him.

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8. The motel was very clean. We stayed at that motel.

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9. The person never came. Sally was waiting for that person.

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10. I never found the book. I was looking for it.

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11. One of my subjects is Literture. I have been interested in Literature for a long time.

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12. The interviewer wanted to know the name of the college. I had graduated from this

college.

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13. Organic chemistry is a subject. I am not familiar with it.

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14. The chair is very hard. I am sitting in this chair.

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7. The person who I spoke to was very friendly

8.The motel which we stayed at was very clean

9. The person for whom Sally was waiting never came

10 I never found the book which I was looking for

11 One of my subjects in which I have been interested is Literature for a long time.

12 The interviewer wanted to know the name of the college which I had graduated from.

13 Organic chemistry with which I am not familiar is a subject

14 The chair which I am sitting in is very hard

Giải thích: Dùng giới từ+Which: chỉ vật

Giới từ+ whom: chỉ người (không được dùng who)

Lưu ý khi giới từ đi cùng đại từ quan hệ thì chỉ dùng whom(đối với người), which(đối với vật).

Giải thích:

+ Which là đại từ quan hệ dùng để thay thế cho danh từ chỉ vật và đóng vai trò chủ ngữ hoặc tân ngữ trong câu.

− Đại từ quan hệ "Who" dùng để thay thế cho người đóng vai trò là chủ ngữ hoặc tân ngữ

Đại từ quan hệ "Whom" dùng để thay thế cho người đóng vai trò là tân ngữ trong câu.