40.If I had prepared ahead of time for my trip, I ...so many problems. a) won't have b)wouldn't have had c)hadn't had

Решение:

Это третье условное предложение (Third Conditional), которое используется для описания нереальных ситуаций в прошлом. Формула: If + Past Perfect, would have + Past Participle.

В данном случае, после 'If' идет Past Perfect ('had prepared'). Следовательно, во второй части предложения должно быть 'wouldn't have had'.

Пример: If I had known, I would have helped.