4. Do you still remember the day _____ we first met?

　 A. that　　　　　　　　　　　 B. when　　　　　　　　 C. what　　　　　　　　 D. on that

3. The factory _____ Mr. Li used to work was closed last week.

　 A. when　　　　　　　　　　 B. where　　　　　　　 C. that　　　　　　　　　 D. which

2. Have you visited the house _____ the famous scientist was born?

　 A. where　　　　　　　　　 B. in that　　　　　　　 C. that　　　　　　　　　 D. which

1. This is the school _____ Mr. Smith once taught.

　 A. in that　　　　　　　　　 B. when　　　　　　　　 C. where　　　　　　　 D. there

15. He bought a book yesterday, the author ________ which is a teacher.

14. The desk ________ which Jack is leaning is John’s.

13. Ours is a beautiful school, ________ which we are proud.

12. Do you know the building ________ which is flying a red flag?

11. His bike ________ which he went to work was stolen last night.

10. The age _______ which children can go to school is seven.