Вставьте am,is,are. Mountains big,A zoo small,A stadium big,A bridge long,Forests green,A country beautiful,Rivers longs,A

1. Mountains are big.2. A zoo is small.3. A stadium is big.5. A bridge is long.6. Forests are green.7. A country is beautiful.8. Rivers are long.9. A lake is blue.10. A station is big.11. I am smart.12. Caves are brown.13. I am not (I\'m not) lazy.