1. The typhoon destroyed the tree houses that we (build) had built. Ans: had built

2. He (not / be) had not seen to Manila before 1991. Ans: had not seen

3. When she went out to play, she (finish / already) had already finished her project. Ans: had already finished

4. My sister ate all of the cake that our mum (bake) had baked. Ans: had baked

5. The doctor removed the plaster that he (put on) had put on two months before. Ans: had put on

6. The waiter brought a dessert that I (not / order) had not ordered. Ans: had not ordered

7. I could not remember the song we (learn) had learnt the week before. Ans: had learnt

8. We picked up the lotus blossoms that (fall) had fallen from the tree. Ans: had fallen

9. (he / phone) had phoned Helen before he left to see her in Macau? Ans: had phoned

10. She (not / be) had not been on a motorbike before that day. Ans: had not been