11. If you (leave) that cut untreated it (will become) infected.
12. It you (ask) him for help he will always (give) it.
13. If he (travels) all afternoon I know he (will not want) to go out this evening.
14. George (will leave) tomorrow if the weather (is) fine.
15. We (shall go) riding tomorrow if the horse's leg (is) better.
16. The council (will arrange) a concert if they (find) enough singers.
17. If the garage (repairs) the car we (will be able) to go to the mountains tomorrow?
18. That artist will only (paint) another picture if he (finds) a suitable model.