Question

All the intellectual work was done by Mr. Cavor. перевести из пассивного в активный залог

Answer 1

All the intellectual work was done by Mr. Cavor.

 

Mr. Cavor had done all the intellectual work

Answer 2

Mr caviar had done all the intellectual work
Как то так но я не уверен!!

Answer 3

Mr. Cavor did all the intellectual work.