7. Some of these sentences aren't right. Correct them.

Исправленные предложения

1. I don't know if Mike will stay with us or not.
2. If she plays the game, she will win. She's very good at tennis.
3. These children will be seven when September comes.
4. We won't go skating if it is very cold.
5. I'll call you as soon as the film is over.
6. I'd like to know if you'll come to the party.
7. After they buy the food, they'll begin cooking.
8. Write to me if you come to Moscow next summer.
9. Stay here until I return from the bank.
10. Before summer comes, we won't leave the city for the sea.
11. Don't go out if it rains.
12. When autumn comes, the leaves will start falling from the trees.