Combine two sentences by using relative pronoun 4. The children were playing football in the schoolyard. They were my students 5. A girl answered the phone. She told me "You were out" 6. The chair was broken two days ago. The chair has now beed repaired 7. I saw some people. Their car had broken down 8. I recently went back to my hometown. I was born there 9. Some buildings were hit by bombs. They are still burning 10. Some people want to smoke. They have to leave the the building 11. The doctor was very thorough. Ingrid went to see him 12. A scientist discovered the neutron. He was James Chadwick 

4. The children who were playing football in the schoolyard were my students.

5. A girl who answered the phone told me "You were out".

6. The chair which was broken two days ago has now been repaired.

7. I saw some people whose car had broken down.

8. I recently went back to my hometown where I was born.

9. Some buildings were hit by bombs which are still burning.

10. Some people want to smoke which have to leave the building.

11. The doctor whom Ingrid went to see him was very thorough.

12. A scientist discovered the neutron who was James Chadwick.