Выбрать правильный вариант ответа: When the manager arrived, the problem ＿1/had already...

Question

Выбрать правильный вариант ответа: When the manager arrived, the problem ＿1/had already been solved 2/ had already solved 3/ had solvedПожалуйста!!!​

Answer 1

Ответ:

When the manager arrived. the problem had already been solved

Первый вариант правильный.

Объяснение: