. Change the sentences using the Passive For example: He writes a new play every time the theatre asks for it.
Passive: A new play is written by him every time the theatre asks for it.
1. Films usually include an optical soundtrack.

2. During projection, a rotating shutter causes intervals of darkness

3. The individual images make up a film.

ivansobolev000Ivan    3   29.03.2021 19:32    2