Место пробелов вставить (который? кто? что? когда? где? )

[email protected] в категроии Английский язык, вопрос открыт 13.04.2018 в 15:34

Which ,who ,that ,when,where .
1. 1843 was the year in ... Samuel Morse proposed a way to give every letter and number a special code (point ,line and space).
2. It was Morse's Symbol code ... we can still find used today .
3. Alexander Popov from Russia ... invention of the radio came before Marconi's, did non patent it.