1) At the beginning,

were unsure about the future of sound.
2) It was clear that the

of the film industry would have to change.
3) A new

would have to be built.
4) Expensive

would have to be installed.
5) All

would have to be wired for sound.

6)

would have to be developed.
7) The

would be upturned.
8)

would plummet (fall rapidly).
9) Before,

could easily be translated for export.
10) For some people in Hollywood, sound would, hopefully, just be a

.