Question

1)And in 1907 they produced the first colour film.2)The brothers kept their new invention as a closely-guarded secret.3)Auguste organized private screening to the invited guests only.
Change these sentences in the Passive Voice

Answer 1

1.The firsr colour film was produced in 1907 by they.
2.New invention were kept as a closely-guarded secret be the brothers.
3.Private screening was organised to the invited guests only by Auguste