1. If there is no hotel in this town, we'll have to sleep in the car.
2. We'll order hamburgers if they have no pizza.
3. Will I get a discount if I buy ten boxes?
4. If you need any help, just tell me.
5. Can I go home at five if I finish the project by that time?
6. You'll find the book interesting if you to read the first ten pages.
7. If you lose your keys, I'll give you mine.