Он не знал, что труду, на который о

Он не знал, что труду, на который он потратил всю свою жизнь, не суждено было быть признанным.

Результаты (английский) 1:

He did not know that the work for which he has spent his entire life, was not to be recognized.

Результаты (английский) 2:

He did not know that the work to which he has spent his entire life, was not destined to be recognized.

Результаты (английский) 3:

he didn't know what work, for which he spent his whole life was not to be recognized.