Укажите верный вариант :
A. By 9 o'clock yesterday I had written all my letters.
Б. By 9 o'clock yesterday I have written all my letters.
В. By 9 o'clock yesterday I was written all my letters.
Г. By 9 o'clock yesterday I written all my letters.

Это нам такое задание по английскому задали

тут вообще всё не правильно) но ответ анужно как бы так: i had written all my letters be 9 o'clock yesterday