Put the verbs into the correct form (past perfect simple)?

Put the verbs into the correct form (past perfect simple). 1. The storm destroyed the sandcastle that we - - - - - - - (build). 2. He - - - - - - - - - - (not / be) to Cape Town before 1997. 3. When she went out to play, - - - - - - - - - (do / already) her homework. 4. My brother ate all of the cake that our mom - - - - - - - - - (make). 5. The doctor took off the plaster that he - - - - - - - - - - - (put on) six weeks before. 6. The waiter brought a drink that I - - - - - - - - - - - (not / order). 7. I could not remember the poem we - - - - - - - - - (learn) the week before. 8. The children collected the chestnuts that - - - - - - - - (fall) from the tree. 9. - - - - - - - - - - - (he / phone) Angie before he went to see her in London? 10. She - - - - - - - - - - - - - (not / ride) a horse before that day.