Ответ:
a) Paul had spent his holiday in Holland.
b) They had already done their work.
c) She had asked that question before.
d) I had never seen such a thing.
e) We had been there before.
f) The boys had destroyed the garden.
g) The children had broken the vase.
h) He had already arrived from Venice.
i) They had never been to Taiwan
.
j) I had never arrived late at school.