1. People couldn't communicate before they invented the alphabet.=False(In the ancient world there were thousands of foot messengers who formed an ancient communication network.)2. In the ancient world people also had big, fast communication networks.=True (In the ancient world there were thousands of foot messengers who formed an ancient communication network.=здесь можно под вопросом поставить и ответ False, так как по сути не сказано, что это был БЫСТРЫЙ способ сообщения..то есть сомнительно))3. Marathon is the name of a place in ancient Greece.=False (He had covered a distance of 26 miles. In honour of that soldier, sportsmen nowadays run the same distance — a marathon. )4. In medieval times people used the telegraph.=False(people used the high towers of their castles to send and receive messages about the enemies.)5. The American Indians used smoke signals because they couldn't read or write.=D.S (American Indians didn't build high towers but used smoke signals to send important information. =но не сказано, что они это делали потому, что не умели читать и писать)6. People invented the post in the 18th century.=D.S7. In the 19 th century people used some code for the telegraph.=D.S8. At Dede Gorgud's time on unhappy days people set a fire on the hills.=False (not only on unhappy but on happy days, too)9. People all over the world communicate only by the help of birds.=False