Answer: true,false or no information1. people couldn't communicate before they invented the alphabet.2. in the ancient world people also had big, fast communication networks.3. marathon is the name of a place in ancient greece.4. in medieval times people used the telegraph.5. the american indians used smoke signals because they couldn't read or write.6. people invented the post in the 19th century.7. alexander graham bell invented the telephone.8. in the 19th century people used morse code for the telegraph.

1. People couldn't communicate before they invented the alphabet. false2. In the ancient world people also had big, fast communication networks. false 3. Marathon is the name of a place in ancient Greece. true 4. In medieval times people used the telegraph. false 5. The American Indians used smoke signals because they couldn't read or write. true 6. People invented the post in the 19th century. false 7. Alexander Graham Bell invented the telephone. true 8. In the 19th century people used Morse code for the telegraph. true

1.f
2.t (relatively fast and big; say, Roma, with its messengers, seaborne trade)
3.t
4.f
5.t
6.f
7.t
8.t