1 - Replace the letter with the appropriate tense of the verbs in parentheses to complete the sentences
about the history of the radio.
James Clerk Maxwell A ________________ (not/create) the first radio.
He B________________ (develop) the first radio-wave mathematical formula.
In 1888, Heinrich Hertz C________________ (test) Maxwell’s assumption.
The radio D ________________ (be) a subdivision of telecommunication.
“When E ________________Oliver Lodge F ________________ (name) the coherer?” “In 1894.”
In 1888, Temistocle Calzecchi-Onesti G ________________ (demonstrate) that a tube with iron filings
conducted an electrical current.
Radio communication H ________________ (involve) the transmission of electromagnetic waves.
Before the 19th century, many scientists I ________________ (try) to invent something like the radio.
Marconi J ________________ (notice) that electromagnetic waves K ________________ (travel) between
two points separated by an obstacle.
