Ответ:

1. If the weather is fine, they will walk

2. If you are responsible, you will study at school well.

3. If people aren't polluting the environment, the air will be clean.

4. I will tell you the news, if you ring me up.

5. You will get only bad marks at school, if you don't do your homework

6. If Pete isn't behave himself carefully, he will get into trouble

7. If it snows, children will skate

8. If a person gets up early, he or she will do a lot of useful things

9. If he reads more books and newspapers, he will write dictations better

10. If people play sports, the will be stronger

1.If I had a lot of money, I would buy a new comfortable flat

2. If I were you, I would buy present for my grandparents

3. He would go to America, If he knew English very well

4. Sasha would money on more interesting things if he won a competition

5. If we didn't pollute our rivers, would be full of fish

6. If people took care of their planet, they wouldn't have so many problems

7. If I were the head of our school, I wouldn't allow teacher to give bad marks