Reading 4 a) Read the text and mark the T (true) or F (false).

1 Cahokia is a very old site. - T
2 Not many people lived there. - F
3 They had very tall pyramids. - F
4 The city had walls to keep the enemies out. - T
5 The people there couldn't tell the difference between animals and plants. - F
6 They were hunters. - T
7 They raised animals for food. - T
8 Lack of food is a possible reason for the city's decline. - T