If you hadn’t come, I ... the project on time. Choose the correct option: would finished; finished; had finished; would have finished.

В условном предложении третьего типа используется конструкция if + Past Perfect и would have + Participle II: would have finished.

Ответ: If you hadn’t come, I would have finished the project on time.

Перевод: «Если бы ты не пришёл, я бы закончил проект вовремя».