Ответ:
1. If Linda were here, I'm sure she would help us.
2. What would you do if you saw a ghost?
3. If I found some money in the street, I would take it to the police.
4. Michael would be angry if someone took his computer without permission.
5. If we don't catch the nine o'clock, we might arrive too late.
6. Carla will not be upset if you tell her the truth.
7. If I knew how to solve this problem, I would do it.
8. If I fail the exam, I will be very disappointed. I've studied so hard.
9. Jenny could make a nice cake if she knew how to cook well.
10. If my husband was a famous actor, he would earn a lot of money.
11. We wouldn't learn so quickly if we didn't have such a good teacher.
12. If it rains tomorrow, we won't go to the beach but the sky is so clear.
13. If you stay at home tonight, you might not see Tina at the party.
14. I would learn Japanese if I had the time to do it.
15. What would you do if you lost your passport in a foreign country?
16. If you try to give up smoking, you will feel much better.
17. If someone stole my car, I would report it to the police immediately.
18. Our friends will be really angry if we don't go to their party next Friday.