Вставьте am,is,are. mountains big,a zoo small,a stadium big,a bridge long,forests green,a country beautiful,rivers longs,a lake blue,a station big,i smart,caves brown,i not lazy.

1. mountains are big
2. a zoo is small 
3. a stadium is big
4. a bridge is long 
5. forests are green
6. a country is beautiful
7. rivers are long
8. a lake is blue 
9. a station is big
10. I am smart
11. caves are brown 
12. I am not lazy 

Mountains are big,a zoo is small,a stadium is big,a bridge is long,forests are green,a country is beautiful,rivers are long,a lake is blue,a station is big,i am smart,caves are brown,i am not lazy.