Read the text and mark the sentences 1-8 (true) or F (false). 1 Cahokia is a very old site 2 Not many people lived there. 3 They had very tall pyramids. 4 The city had walls to keep the enemies away. 5 The people there couldn't tell the time. 6 They were hunters 7 They raised animals for food. Lack of food is a possible reason why people left the city.