1. Van Gogh would have got some recognition during his lifetime, if

Решение:

Это предложение относится к условным предложениям третьего типа, которые выражают сожаление о прошлом или говорят о нереальных условиях. Для таких предложений используется конструкция "If + Past Perfect, ... would have + Participle III".

Правильный вариант: he had sold his paintings.

Полное предложение: Van Gogh would have got some recognition during his lifetime, if he had sold his paintings.

Ответ: he had sold his paintings