Fill in the past form.
1. Mammoths __________ big animals, bigger than elephants. (be)
2. Mammoths __________ 100 years ago. (not live)
3. Mammoths __________ a long time ago. (live)
4. Mammoths __________ meat. They __________ grass. (not eat / eat)
5. They __________ two large tusks about three metres long. (have)
6. Some dinosaurs__________ in the air and some__________ in the sea. (fly / swim)
7. He __________ some milk. He__________ any water. (drink / not drink)
8. She only__________ a pound. She __________ 3 pounds. (spend / not spend)
9. I ____________________ some elephants. I __________any lions. (see / not see)
10. They__________ in the sea, but ____________________ in the lake. (swim / not swim)