在英语语法中，定语从句是一种非常重要的结构，它能够帮助我们更准确地描述或限定某个名词。为了更好地掌握这一知识点，下面为大家准备了一些定语从句的练习题，并附有详细的答案解析。
练习题：
1. The book ________ you gave me yesterday is very interesting.
A) who B) whom C) which D) whose
2. This is the man ________ I met at the party last night.
A) that B) whom C) whose D) which
3. The girl ________ is standing under the tree is my sister.
A) who B) whom C) which D) whose
4. The house ________ windows face south is mine.
A) that B) whose C) which D) where
5. The teacher ________ class we attended yesterday was very knowledgeable.
A) who B) whom C) whose D) which
6. The city ________ I was born is beautiful.
A) that B) where C) which D) when
7. The man ________ you talked to just now is my father.
A) who B) whom C) whose D) which
8. The letter ________ I received from him yesterday was very long.
A) that B) whom C) whose D) which
9. The book ________ cover is red belongs to my friend.
A) that B) whose C) which D) where
10. The boy ________ mother is a doctor studies hard.
A) who B) whom C) whose D) which
答案及解析：
1. C) which
解析：“which”用于指代事物，这里用来修饰“the book”。
2. A) that
解析：“that”可以用来指代人或事物，在定语从句中引导句子。
3. A) who
解析：“who”用于指代人，这里修饰“the girl”。
4. B) whose
解析：“whose”表示所属关系，这里指“窗户属于房子”。
5. A) who
解析：“who”用于指代人，这里修饰“the teacher”。
6. B) where
解析：“where”用于指代地点，在这里修饰“the city”。
7. B) whom
解析：“whom”用于指代人，在这里作宾语。
8. A) that
解析：“that”用于指代事物，在这里修饰“the letter”。
9. B) whose
解析：“whose”表示所属关系，这里指“书的封面”。
10. C) whose
解析：“whose”表示所属关系，这里指“男孩的母亲”。
通过以上练习题，我们可以更加清晰地理解定语从句的应用范围和使用方法。希望大家在学习过程中多加练习，逐步提高自己的语法水平！
