Контрольные задания > A. Choose the correct word or phrase. 13. The Vikings had visited America before it was / has discovered by Columbus.
Вопрос:
A. Choose the correct word or phrase. 13. The Vikings had visited America before it was / has discovered by Columbus.
Ответ:
The correct answer is 'was discovered'.
Explanation: We use 'was discovered' because the discovery of America by Columbus happened in the past. The action was done by another person, so we use the passive voice