Question

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

Answer 1

1 ecли точно стоит in-тогда which ( лучше when)
2 which
3 whose