Ответ: 1) I don’t know the answer. If I knew the answer, I’d tell you.2) I have a car. I couldn’t travel very much if I didn’t have a car.

3) I don’t want to go out. If I wanted to go out, I’d go.

4) We haven’t got a key. If we had a key, we could get into the house.

5) I’m not hungry. I would have something to eat if I were hungry.

6) Sue enjoys her work. She wouldn’t do it if she did not enjoy  it.

7) You can’t drive. If you could drive, I would lend you my car.

8) He speaks too fast. I could understand him better if he spoke more slowly.

9)I have a lot to do today. If I didn’t have so much to do, we could go out.