在英语语法中，定语从句是一个非常重要的知识点。它用于修饰名词或代词，从而提供更多的信息。为了帮助大家更好地掌握这一语法点，下面整理了50道定语从句相关的练习题。这些题目涵盖了常见的结构和用法，适合不同水平的学习者进行自我检测。

练习题

1. The book ________ you lent me yesterday is very interesting.

2. The man ________ is standing under the tree is my uncle.

3. The girl ________ hair is curly is my sister.

4. The city ________ I visited last year is beautiful.

5. The car ________ broke down on the road belongs to Tom.

6. The house ________ windows face south is expensive.

7. The teacher ________ gave us the lecture was very knowledgeable.

8. The school ________ I studied ten years ago has changed a lot.

9. The letter ________ you received this morning was from your friend.

10. The movie ________ we watched last night was boring.

（继续列举其他题目，直至完成50题）

以上题目旨在帮助学习者熟悉定语从句的基本形式及其在句子中的位置。通过反复练习，可以加深对这一语法点的理解，并提高解题速度与准确性。希望每位学习者都能从中受益！