Fragment książki:
The stairway was dark and narrow, and "back" stairback, but he
had known and
made a study of all that before...
Fragment zadania z "Grammar in context"
Brenda pearl joined our firm ten years ago. She
had worked for the previous five years with an advertising company and
had acquired much useful expierence.
Jak to jest z opuszczaniem "had" w drugim "clause"? (W kluczu do zadania z "Grammar in context" nie ma w kluczu opcji opuszczenia "had")