Complete the sentences: 1. Long ago men used different means of long distance communication: light of fires, smoke of fires and loud sound of drums.

1. Long ago men used different means of long distance communication such us: light of fires, smoke of fires and loud sound of drums.
2. The electric telegraph was invented by the Russian scientist P. L. Shilling.
3. People used a special code to send words over the telegraph.
4. The person who talked into the first telephone could not hear and the person who heard could not talk.
5. Today we can talk across seas, oceans and continents: there is hardly a corner of civilized world that cannot be reached by telephone.