Complete the sentences with the correct form
of the verb in brackets.

1 Liquid Paper was
(invent) by
Bessie Nesmith in 1951
2
Penicillin was
(discover by
Alexander Fleming.
The first telegraph system was
(build) by Samuel Morse in
3
1835.
4 The first radio transmission across the
Atlantic was
(make) on
December 12, 1901.
5 The World Wide Web was
(launch) in 1990 after Tim Berners-Lee
created the first browser.
6 The first commercial mobile phones were
(sell) by NTT in Japan in 1979.​