____________ is expensive as every written word is charged.
Letter
Telephone
Telegram
None of these
We should sent only a brief message through a ____________.
Fax
Samuel Mores inverted the ________________ telegraph machine.
Electric
Synthetic
__________ has made television a popular and effective media.
Cable connections
Advertising
Computer
Newspaper
Radio was invented by________________.
Marconi
Graham Bell
George
