Réponse :
1. An old silent movie dating back from 1988 has been found.
2. Sound has been introduced in 1927
3. Most of the scenes have been shot in a studio
4. Big sums of money must be invested.
5. A computer program will be used.
6. A new way of coulouring black and white films has been discovered
7. New special effects are being designed.
Explications :
J'espère que c'est juste :)