1. We don’t visit you very often because you live so far away.  If you 2. That book is too expensive, so I’m not going to buy it.  If the book 3. We don’t go out very often because we can’t afford it.  If we 4. We haven’t got any money so we can’t go on the trip.  If we 5. Water these plants or they will wither.  If you 6. I have to work late tomorrow, so I can’t join your party.  If I 7. Unless you study harder, you won’t pass the final exam.  If you 8. I’ve got a lot of work to do, so I can’t go home for lunch now. If I 9. She is not a millionaire so she can’t buy a house in Tokyo.