在英语学习中，定语从句是一个非常重要的语法知识点。它能够帮助我们更精确地描述名词或代词，从而让句子更加丰富和具体。为了帮助大家更好地掌握这一知识点，下面整理了一组精选的定语从句练习题，并附上了详细的参考答案。
一、单项选择题（共30题）
1. The book _______ you gave me yesterday is very interesting.
A. who B. whom C. which D. whose
解析：这里需要一个关系代词来引导定语从句，先行词是“the book”，所以应该选择C. which。
2. He is the man _______ saved the drowning girl.
A. who B. whom C. whose D. that
解析：“man”是人，因此可以用who或that引导定语从句，正确答案为D. that。
3. This is the factory _______ my father worked for 20 years.
A. where B. when C. which D. what
解析：这里表示地点，所以要用where引导定语从句，答案为A. where。
二、填空题（共10题）
41. The boy _______ parents are teachers studies hard.
42. The letter _______ I received yesterday was from my friend.
43. The school _______ we visited last week is famous for its history.
44. The teacher _______ spoke at the meeting was very inspiring.
45. The book _______ lies on the table is mine.
三、改错题（共10题）
51. The man whom you talked just now is our new teacher.
改正：The man _______ you talked to just now is our new teacher.
52. This is the house which we lived in five years ago.
改正：This is the house _______ we lived five years ago.
以上就是这50道精选定语从句练习题及其参考答案。希望大家通过这些题目能够加深对定语从句的理解，并且能够在实际应用中灵活运用。如果还有任何疑问，欢迎继续探讨交流。
