1. The students talked about the movie they (watch) had watched. Ans: had watched

2. He was late for work because I (miss) had missed he ferry. Ans: had missed

3. We used to live on a boat that my father (build) had built. Ans: had built

4. We admired the photo that Lucy (take) had taken. Ans: had taken

5. They watered the flowers that they (plant) had planted. Ans: had planted

6. The teacher marked the exams that the pupils (do) had done. Ans: had done

7. I did well in the exam because I (practise) had practised a lot. Ans: had practised

8. The internet shopping site did not send me the trousers that I (order) had ordered. Ans: had ordered

9. I had to clean the carpet because my children (spill) had spilled milk all over the floor. Ans: had spilled

10. My friend was broke her leg after she (slip) had slipped on a banana skin. Ans: had slipped