Ответ:

1. If Anne's father gets seriously ill, they will bring him to the hospital.

2. If I were you, I would pay more attention in class.

3. They won't go out if they don't get a babysitter.

4. The manager would have fired him if he had someone else to replace him.

5. I would have liked her more if she hadn't asked such stupid questions.

6. If you don't knock, they won't let you in.

7. If I had missed the bus, I would have taken a taxi.

8. We will visit the sports centre tomorrow unless it rains.

9. I would have helped him if I had known that his condition was so bad.

10. He wouldn't go to the course if it were not so interesting.

11. I would have called if I had had his mobile number.

12. If I won the lottery, I would go on an extended vacation.

13. If I had not been careful, he would have lost his job.

14. Would she stay at home if I asked her to?

15. If her daughter worked harder, she would pass the exam.

16. If the French lessons had been more interesting, Mary wouldn't have attended a different school.

17. He wouldn't have been so happy if he hadn't had such a good life.

18. If I were a millionaire, I would stop working at once.

19. If you marry Peter, you would be happier.

20. I will give you the news as soon as I get it.