Допишите -s там, где это необходимо.

1. I live in Omsk and you live in Omsk too. 2. He lives in Smolensk and they live in Kaluga. 3. They count to ten and she counts to twenty. 4. He sings Russian songs and she sings Italian songs. 5. The bird sings wonderfully. 6. The birds sing wonderfully. 7. I swim in the swimming pool and Oleg swims in the river. 8. My sister collects dolls. 9. My grandparents collect postcards. 10. Alla makes salad and the boys cut the bread.