Past Simple vs Past Perfect

The storm destroyed the sandcastle that we ______ (build).

He ______ (not / be) to Cape Town before 1997.

When she went out to play, she ______ (do / already) her homework.

My brother ate all of the cake that our mum _____ (make).

The doctor took off the plaster that he ______ (put on) six weeks before.

The waiter brought a drink that I _______ (not / order).

I could not remember the poem we _______ (learn) the week before.

The children collected the chestnuts that _____ (fall) from the tree.

________ (he / phone) Angie before he went to see her in London?

She ______ (not / ride) a horse before that day.