1. I had eaten the ice-cream that I ... in the shop.

Необходимо выбрать подходящую форму глагола для завершения предложения.

Подходящий вариант: had been bought.

I had eaten the ice-cream that I had been bought in the shop.

Перевод: Я съел мороженое, которое было куплено в магазине.

Ответ: had been bought