fill in the where necessary

Ответ от Stanislawa[гуру]
1. Moscow is on the Moskva River.2. It is washed by the waters of the
Atlantic Ocean.3. "Is this your friend?" — "No, it isn't my
friend, it is my sister".4. Are you studying foreign languages at
school, like French?5. I can see three children. The children are
playing in the yard.6. We celebrate New Year on the 31st of December.7.He lives in Paris.8. Smiths have a dog and a cat.9. He is an economist.
10. What a strange girl!11.Could you close
the door, please?12. The Earth goes round the Sun.13. Mark Twain is famous
for his book "The Adventures of Tom Sawyer"14. What's the highest
mountain in the world?15. This is a tree. The tree is green.