Past Simple или Past Perfect: 1.
The storm
(destroy) the house that they had built.
2.
When she went out to
play, she (do / already) her homework.
3.
The children
(clean) the blackboard they had used to do the
mathematics exercise.
4.
He took off the jacket
he (put on) before.
5.
They (eat) all of the food that she had made