Make conditional sentences according to the facts provided.
1. Keep silent or you'll wake the baby up.
2. Because you don't leave immediately, I call a policeman.
3. I don't know her number, so I don't ring her up.
4. Go right now or you'll be late for the train.
5. As she is often absent from class, she can't keep pace with her classmates.
6. I couldn't write to Alice because I didn't know her address.
7. I don't know the answer, so I can't tell you.
8. We got lost because we didn't have a map.
9. His friends were so late, so they missed the train.
10. Today isn't Sunday, so the pupils can't go swimming.
11. The heavy rain kept everybody from going out.
12. This chair is too heavy for him to move.
13. We had a flu because he went out in the rain last night.
14. The church bells keep me from sleeping.
15. Morning exercises make me feel better.
16. Stop talking or you won't understand the lesson.
17. The boy is so young that he can't go to school.
18. The fridge keeps the food from spoiling.
19. Why don't you study hard?
20. Why don't you stop smoking?
21. Be careful, or you'll cut yourself with that knife.
22. Be calm, or you'll make a wrong decision.
23. Without the air, we would die.
24. Without a visa, she couldn't have come to that country.
25. Without the sun, man would live in the darkness.
26. Without money, he wouldn't have bought such a big house.
27. Smoking makes him so weak.
28. It was very cold yesterday, so he couldn't go swimming.
29. It is very cold, so we can't go swimming.
30. I didn't watch TV last night because I was busy.