在英语学习过程中，定语从句是一个非常重要的语法知识点。它不仅能够丰富句子结构，还能让表达更加准确和清晰。为了帮助大家更好地掌握这一语法点，以下是一些关于定语从句的专项练习题及详细解析。
一、选择题（每题只有一个正确答案）
1. The book ______ I borrowed from the library is very interesting.
A. which
B. that
C. who
D. whom
2. The man ______ is standing over there is my uncle.
A. which
B. that
C. who
D. whom
3. This is the house ______ I was born.
A. where
B. which
C. that
D. when
4. The girl ______ won the first prize is my classmate.
A. which
B. that
C. who
D. whom
5. The city ______ we visited last summer is very beautiful.
A. where
B. which
C. that
D. when
二、填空题
6. This is the factory ______ we worked last year.
7. The person ______ you met yesterday is a famous scientist.
8. The reason ______ he didn’t come is not clear.
9. The students ______ passed the exam are all happy.
10. The teacher ______ spoke to us was very kind.
三、改错题（找出错误并改正）
11. The man whom I saw in the park is my neighbor.
12. The house which is on fire is mine.
13. The boy who is playing football is my brother.
14. The book that I bought it is very expensive.
15. The girl who she is talking to is my sister.
四、翻译题（将下列句子翻译成英文）
16. 我昨天遇到的那个男孩是老师。
17. 这是我去年参观过的城市。
18. 她就是那个在会议上发言的人。
19. 那本书我读了之后感到很惊讶。
20. 他就是你一直在找的那个人。
五、参考答案
一、选择题：
1. A / B
2. C
3. A
4. B / C
5. B / C
二、填空题：
6. where
7. who / that
8. why
9. who / that
10. who / that
三、改错题：
11. “whom” 改为 “who”
12. “which” 改为 “that” 或去掉
13. 正确
14. “it” 删除
15. “who she” 改为 “who”
四、翻译题：
16. The boy whom I met yesterday is a teacher.
17. This is the city that I visited last year.
18. She is the one who spoke at the meeting.
19. The book that I read made me surprised.
20. He is the person that you have been looking for.
通过这些练习，希望大家能够更加熟练地运用定语从句，提升自己的英语表达能力。建议多做类似的题目，并结合实际语境进行理解和记忆。
