Past simple

1.Mammoths were big animals,bigger than elephants.
2.Mammoths did not live 100 years ago.
3.Mammoths lived a long time ago.
4.Mammoths did not eat meat.They eat grass.
5.They had two large tusks about three meters long.
6.I did not pay by credit card.I paid cash.
7.He drank some milk.He did not drink any water.
8.She only spent a pound.She did not spend 3 pounds.
9.I saw some elephants.I did not see any lions.
10.They did not swim in the sea,but they swam in the lake.