Наконец все коллеги заметили его до

Наконец все коллеги заметили его достижения и поверили в него.
Читатель узнает правду только в конце книги.
Прошло несколько лет и в конце концов они встретились вновь .
В конце прошлого тысячелетия человечество столкнулось с новыми проблемами .

Результаты (английский) 1:

Finally all colleagues noticed his achievements and believe in him.The reader learns the truth only at the end of the book. Several years passed and in the end they met again. At the end of the last millennium, mankind is confronted with new challenges.

Результаты (английский) 2:

Finally all colleagues noticed his advances and believed in him.
The reader learns the truth only at the end of the book.
It took several years and eventually they met again.
At the end of the last millennium, humanity is faced with new challenges.

Результаты (английский) 3:

finally, all colleagues noticed his achievements and believe in it.the reader will know the truth, only at the end of the book.it's been a few years, and in the end they met again.at the end of the last millennium, humankind is faced with new challenges.